diff --git a/tests/data/imports.yml b/tests/data/imports.yml
index 0f02c8f..b6d81b7 100644
--- a/tests/data/imports.yml
+++ b/tests/data/imports.yml
@@ -2,13 +2,14 @@
   importer: patreon.Income2017Importer
   expect:
     - payee: Alex Jones
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["1500.00"]
+      # PyYAML 6 appears to require UnsafeLoader to handle complex Python tags.
+      date: !date "2017-09-01"
+      amount: !decimal "1500.00"
       currency: USD
       email: alex@example.org
     - payee: Dakota Doe
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["12.00"]
+      date: !date "2017-09-01"
+      amount: !decimal "12.00"
       currency: USD
       email: ddoe@example.org
 
@@ -19,15 +20,15 @@
       email: ajones@example.com
       tier: Even tier
       patreon_id: "1234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2"]
+      date: !date "2020-08-01"
+      amount: !decimal "2"
       currency: USD
     - payee: Breonna
       email: breonna@example.org
       tier: Odd tier
       patreon_id: "234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 2]
-      amount: !!python/object/apply:decimal.Decimal ["5.00"]
+      date: !date "2020-08-02"
+      amount: !decimal "5.00"
       currency: USD
 
 - source: PatreonPatronReport_2020-10-01.csv
@@ -37,15 +38,15 @@
       email: ajones@example.com
       tier: Even tier
       patreon_id: "1234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2"]
+      date: !date "2020-08-01"
+      amount: !decimal "2"
       currency: USD
     - payee: Breonna
       email: breonna@example.org
       tier: Odd tier
       patreon_id: "234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 2]
-      amount: !!python/object/apply:decimal.Decimal ["5.00"]
+      date: !date "2020-08-02"
+      amount: !decimal "5.00"
       currency: USD
 
 - source: PatreonPatronReport_2020-11-01.csv
@@ -55,27 +56,27 @@
       email: ajones@example.com
       tier: Even tier
       patreon_id: "1234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2"]
+      date: !date "2020-08-01"
+      amount: !decimal "2"
       currency: USD
     - payee: Breonna
       email: breonna@example.org
       tier: Odd tier
       patreon_id: "234567"
-      date: !!python/object/apply:datetime.date [2020, 8, 2]
-      amount: !!python/object/apply:decimal.Decimal ["5.00"]
+      date: !date "2020-08-02"
+      amount: !decimal "5.00"
       currency: USD
 
 - source: PatreonEarnings.csv
   importer: patreon.ServiceFeesImporter
   expect:
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["61.73"]
+      date: !date "2017-09-01"
+      amount: !decimal "61.73"
       currency: USD
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 10, 1]
-      amount: !!python/object/apply:decimal.Decimal ["117.03"]
+      date: !date "2017-10-01"
+      amount: !decimal "117.03"
       currency: USD
 
 - source: PatreonEarnings2020.csv
@@ -85,75 +86,75 @@
       email: fjones@example.com
       user_id: "32101234"
       event_id: "30123456"
-      date: !!python/object/apply:datetime.date [2020, 12, 3]
+      date: !date "2020-12-03"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["5"]
-      tax_amount: !!python/object/apply:decimal.Decimal ["1"]
-      net_amount: !!python/object/apply:decimal.Decimal ["4.31"]
-      platform_fee: !!python/object/apply:decimal.Decimal ["0.25"]
-      processing_fee: !!python/object/apply:decimal.Decimal ["0.44"]
-      currency_fee: !!python/object/apply:decimal.Decimal ["0"]
+      amount: !decimal "5"
+      tax_amount: !decimal "1"
+      net_amount: !decimal "4.31"
+      platform_fee: !decimal "0.25"
+      processing_fee: !decimal "0.44"
+      currency_fee: !decimal "0"
     - payee: Barbara Johnson
       email: bjohnson@example.com
       user_id: "2345678"
       event_id: "34567890"
-      date: !!python/object/apply:datetime.date [2020, 12, 2]
+      date: !date "2020-12-02"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["6.06"]
-      tax_amount: !!python/object/apply:decimal.Decimal ["1.27"]
-      net_amount: !!python/object/apply:decimal.Decimal ["5.14"]
-      platform_fee: !!python/object/apply:decimal.Decimal ["0.31"]
-      processing_fee: !!python/object/apply:decimal.Decimal ["0.42"]
-      currency_fee: !!python/object/apply:decimal.Decimal ["0.19"]
+      amount: !decimal "6.06"
+      tax_amount: !decimal "1.27"
+      net_amount: !decimal "5.14"
+      platform_fee: !decimal "0.31"
+      processing_fee: !decimal "0.42"
+      currency_fee: !decimal "0.19"
     - payee: Alex Jones
       email: ajones@example.com
       user_id: "7654321"
       event_id: "456789090"
-      date: !!python/object/apply:datetime.date [2020, 12, 1]
+      date: !date "2020-12-01"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["14"]
-      tax_amount: !!python/object/apply:decimal.Decimal ["0"]
-      net_amount: !!python/object/apply:decimal.Decimal ["12.64"]
-      platform_fee: !!python/object/apply:decimal.Decimal [".7"]
-      processing_fee: !!python/object/apply:decimal.Decimal [".66"]
-      currency_fee: !!python/object/apply:decimal.Decimal ["0"]
+      amount: !decimal "14"
+      tax_amount: !decimal "0"
+      net_amount: !decimal "12.64"
+      platform_fee: !decimal ".7"
+      processing_fee: !decimal ".66"
+      currency_fee: !decimal "0"
 
 - source: PatreonEarnings.csv
   importer: patreon.CardFeesImporter
   expect:
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["52.47"]
+      date: !date "2017-09-01"
+      amount: !decimal "52.47"
       currency: USD
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 10, 1]
-      amount: !!python/object/apply:decimal.Decimal ["99.47"]
+      date: !date "2017-10-01"
+      amount: !decimal "99.47"
       currency: USD
 
 - source: PatreonVat.csv
   importer: patreon.VATImporter
   expect:
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2.00"]
+      date: !date "2017-09-01"
+      amount: !decimal "2.00"
       currency: USD
       country_code: AT
       country_name: Austria
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 9, 1]
-      amount: !!python/object/apply:decimal.Decimal ["3.30"]
+      date: !date "2017-09-01"
+      amount: !decimal "3.30"
       currency: USD
       country_code: BE
       country_name: Belgium
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 10, 1]
-      amount: !!python/object/apply:decimal.Decimal ["0.40"]
+      date: !date "2017-10-01"
+      amount: !decimal "0.40"
       currency: USD
       country_code: BG
       country_name: Bulgaria
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2017, 10, 1]
-      amount: !!python/object/apply:decimal.Decimal ["6.05"]
+      date: !date "2017-10-01"
+      amount: !decimal "6.05"
       currency: USD
       country_code: CZ
       country_name: Czech Republic
@@ -162,26 +163,26 @@
   importer: patreon.PayoutImporter
   expect:
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2018, 4, 1]
-      amount: !!python/object/apply:decimal.Decimal ["123.45"]
-      pledges_amount: !!python/object/apply:decimal.Decimal ["0"]
-      transfer_amount: !!python/object/apply:decimal.Decimal ["123.45"]
+      date: !date "2018-04-01"
+      amount: !decimal "123.45"
+      pledges_amount: !decimal "0"
+      transfer_amount: !decimal "123.45"
       currency: USD
     - payee: Patreon
-      date: !!python/object/apply:datetime.date [2018, 5, 1]
-      amount: !!python/object/apply:decimal.Decimal ["2345.67"]
-      pledges_amount: !!python/object/apply:decimal.Decimal ["0"]
-      transfer_amount: !!python/object/apply:decimal.Decimal ["2345.67"]
+      date: !date "2018-05-01"
+      amount: !decimal "2345.67"
+      pledges_amount: !decimal "0"
+      transfer_amount: !decimal "2345.67"
       currency: USD
 
 - source: StripePayments.csv
   importer: stripe.PaymentImporter
   expect:
     - payee: Dakota Smith
-      date: !!python/object/apply:datetime.date [2017, 11, 8]
-      amount: !!python/object/apply:decimal.Decimal ["100.00"]
-      fee: !!python/object/apply:decimal.Decimal ["3"]
-      tax: !!python/object/apply:decimal.Decimal ["0"]
+      date: !date "2017-11-08"
+      amount: !decimal "100.00"
+      fee: !decimal "3"
+      tax: !decimal "0"
       currency: USD
       payment_id: ch_oxuish6phae2Raighooghi3U
       customer_id: cus_DohSheeQu8eng3
@@ -189,10 +190,10 @@
       payout_id: po_aeYees2ahtier8ohju7Eeyie
       description: "Payment for invoice #102"
     - payee: Dakota Jones
-      date: !!python/object/apply:datetime.date [2017, 10, 28]
-      amount: !!python/object/apply:decimal.Decimal ["50.00"]
-      fee: !!python/object/apply:decimal.Decimal ["1.4"]
-      tax: !!python/object/apply:decimal.Decimal ["0"]
+      date: !date "2017-10-28"
+      amount: !decimal "50.00"
+      fee: !decimal "1.4"
+      tax: !decimal "0"
       currency: USD
       payment_id: ch_hHee9ef1aeyee1ruo7ochee9
       customer_id: cus_iepae2Iecae8Ei
@@ -204,65 +205,65 @@
   importer: stripe.PayoutImporter
   expect:
     - payee: Stripe
-      date: !!python/object/apply:datetime.date [2017, 11, 30]
-      amount: !!python/object/apply:decimal.Decimal ["-50"]
+      date: !date "2017-11-30"
+      amount: !decimal "-50"
       currency: USD
-      payment_count: !!python/object/apply:decimal.Decimal ["0"]
-      payment_gross: !!python/object/apply:decimal.Decimal ["0"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["0"]
-      payment_net: !!python/object/apply:decimal.Decimal ["0"]
-      refund_count: !!python/object/apply:decimal.Decimal ["1"]
-      refund_gross: !!python/object/apply:decimal.Decimal ["-50"]
-      refund_fees: !!python/object/apply:decimal.Decimal ["0"]
-      refund_net: !!python/object/apply:decimal.Decimal ["-50"]
-      collected_fee_count: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_gross: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_refund_count: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_refund_gross: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_count: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_gross: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_fees: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_net: !!python/object/apply:decimal.Decimal ["0"]
-      validation_count: !!python/object/apply:decimal.Decimal ["0"]
-      validation_fees: !!python/object/apply:decimal.Decimal ["0"]
-      retried_payout_count: !!python/object/apply:decimal.Decimal ["0"]
-      retried_payout_net: !!python/object/apply:decimal.Decimal ["0"]
-      total_count: !!python/object/apply:decimal.Decimal ["1"]
-      total_gross: !!python/object/apply:decimal.Decimal ["-50"]
-      total_fees: !!python/object/apply:decimal.Decimal ["0"]
-      total_net: !!python/object/apply:decimal.Decimal ["-50"]
+      payment_count: !decimal "0"
+      payment_gross: !decimal "0"
+      payment_fees: !decimal "0"
+      payment_net: !decimal "0"
+      refund_count: !decimal "1"
+      refund_gross: !decimal "-50"
+      refund_fees: !decimal "0"
+      refund_net: !decimal "-50"
+      collected_fee_count: !decimal "0"
+      collected_fee_gross: !decimal "0"
+      collected_fee_refund_count: !decimal "0"
+      collected_fee_refund_gross: !decimal "0"
+      adjustment_count: !decimal "0"
+      adjustment_gross: !decimal "0"
+      adjustment_fees: !decimal "0"
+      adjustment_net: !decimal "0"
+      validation_count: !decimal "0"
+      validation_fees: !decimal "0"
+      retried_payout_count: !decimal "0"
+      retried_payout_net: !decimal "0"
+      total_count: !decimal "1"
+      total_gross: !decimal "-50"
+      total_fees: !decimal "0"
+      total_net: !decimal "-50"
       payout_id: po_faegh6aeghishuethuoSoT2i
       destination_id: ba_chu0Woop5queewi2Ea1Aibah
       balance_txid: txn_EiKahrazei3aeMohk7EeDigh
       failure_txid: ""
     - payee: Stripe
-      date: !!python/object/apply:datetime.date [2017, 11, 29]
-      amount: !!python/object/apply:decimal.Decimal ["146.50"]
+      date: !date "2017-11-29"
+      amount: !decimal "146.50"
       currency: USD
-      payment_count: !!python/object/apply:decimal.Decimal ["2"]
-      payment_gross: !!python/object/apply:decimal.Decimal ["150"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["3.5"]
-      payment_net: !!python/object/apply:decimal.Decimal ["146.5"]
-      refund_count: !!python/object/apply:decimal.Decimal ["0"]
-      refund_gross: !!python/object/apply:decimal.Decimal ["0"]
-      refund_fees: !!python/object/apply:decimal.Decimal ["0"]
-      refund_net: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_count: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_gross: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_refund_count: !!python/object/apply:decimal.Decimal ["0"]
-      collected_fee_refund_gross: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_count: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_gross: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_fees: !!python/object/apply:decimal.Decimal ["0"]
-      adjustment_net: !!python/object/apply:decimal.Decimal ["0"]
-      validation_count: !!python/object/apply:decimal.Decimal ["0"]
-      validation_fees: !!python/object/apply:decimal.Decimal ["0"]
-      retried_payout_count: !!python/object/apply:decimal.Decimal ["0"]
-      retried_payout_net: !!python/object/apply:decimal.Decimal ["0"]
-      total_count: !!python/object/apply:decimal.Decimal ["2"]
-      total_gross: !!python/object/apply:decimal.Decimal ["150"]
-      total_fees: !!python/object/apply:decimal.Decimal ["3.5"]
-      total_net: !!python/object/apply:decimal.Decimal ["146.5"]
+      payment_count: !decimal "2"
+      payment_gross: !decimal "150"
+      payment_fees: !decimal "3.5"
+      payment_net: !decimal "146.5"
+      refund_count: !decimal "0"
+      refund_gross: !decimal "0"
+      refund_fees: !decimal "0"
+      refund_net: !decimal "0"
+      collected_fee_count: !decimal "0"
+      collected_fee_gross: !decimal "0"
+      collected_fee_refund_count: !decimal "0"
+      collected_fee_refund_gross: !decimal "0"
+      adjustment_count: !decimal "0"
+      adjustment_gross: !decimal "0"
+      adjustment_fees: !decimal "0"
+      adjustment_net: !decimal "0"
+      validation_count: !decimal "0"
+      validation_fees: !decimal "0"
+      retried_payout_count: !decimal "0"
+      retried_payout_net: !decimal "0"
+      total_count: !decimal "2"
+      total_gross: !decimal "150"
+      total_fees: !decimal "3.5"
+      total_net: !decimal "146.5"
       payout_id: po_Do9pathoo9Pu8jaePhahJa0e
       destination_id: ba_chu0Woop5queewi2Ea1Aibah
       balance_txid: txn_ahsaixiene6Thie1aiti3tuo
@@ -273,32 +274,32 @@
   expect:
     - payee: Python Person A
       ledger template: nbpy2017 invoice ledger entry
-      date: !!python/object/apply:datetime.date [2017, 10, 19]
-      amount: !!python/object/apply:decimal.Decimal ["80.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["80.00"]
+      date: !date "2017-10-19"
+      amount: !decimal "80.00"
+      tickets_sold: !decimal "1"
+      ticket_price: !decimal "80.00"
       ticket_rate: Early Bird (Ticket - Individual Supporter)
-      shirts_sold: !!python/object/apply:decimal.Decimal ["1"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["0"]
+      shirts_sold: !decimal "1"
+      shirt_price: !decimal "0"
       shirt_rate: "Complimentary for ticket holder (Supporter-level and above) (T-Shirt - Men's/Straight Cut Size L)"
       currency: USD
       status: Invoice
       invoice_id: "83"
-      invoice_date: !!python/object/apply:datetime.date [2017, 10, 19]
+      invoice_date: !date "2017-10-19"
     - payee: Python Person A
       ledger template: nbpy2017 payment ledger entry
-      date: !!python/object/apply:datetime.date [2017, 10, 19]
-      amount: !!python/object/apply:decimal.Decimal ["80.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["80.00"]
+      date: !date "2017-10-19"
+      amount: !decimal "80.00"
+      tickets_sold: !decimal "1"
+      ticket_price: !decimal "80.00"
       ticket_rate: Early Bird (Ticket - Individual Supporter)
-      shirts_sold: !!python/object/apply:decimal.Decimal ["1"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["0"]
+      shirts_sold: !decimal "1"
+      shirt_price: !decimal "0"
       shirt_rate: "Complimentary for ticket holder (Supporter-level and above) (T-Shirt - Men's/Straight Cut Size L)"
       currency: USD
       status: Payment
       invoice_id: "83"
-      invoice_date: !!python/object/apply:datetime.date [2017, 10, 19]
+      invoice_date: !date "2017-10-19"
       payment_id: ch_ahr0ue8lai1ohqu4Gei4Biem
       stripe_id: ch_ahr0ue8lai1ohqu4Gei4Biem
 
@@ -307,31 +308,31 @@
   expect:
     - payee: Python Person B
       ledger template: nbpy2017 invoice ledger entry
-      date: !!python/object/apply:datetime.date [2017, 12, 3]
-      amount: !!python/object/apply:decimal.Decimal ["50.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["50.00"]
+      date: !date "2017-12-03"
+      amount: !decimal "50.00"
+      tickets_sold: !decimal "1"
+      ticket_price: !decimal "50.00"
       ticket_rate: Ticket - Unaffiliated Individual
-      shirts_sold: !!python/object/apply:decimal.Decimal ["0"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["0"]
+      shirts_sold: !decimal "0"
+      shirt_price: !decimal "0"
       shirt_rate: ""
       status: Invoice
       currency: USD
-      invoice_date: !!python/object/apply:datetime.date [2017, 12, 3]
+      invoice_date: !date "2017-12-03"
       invoice_id: "304"
     - payee: Python Person B
       ledger template: nbpy2017 payment ledger entry
-      date: !!python/object/apply:datetime.date [2017, 12, 3]
-      amount: !!python/object/apply:decimal.Decimal ["50.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["1"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["50.00"]
+      date: !date "2017-12-03"
+      amount: !decimal "50.00"
+      tickets_sold: !decimal "1"
+      ticket_price: !decimal "50.00"
       ticket_rate: Ticket - Unaffiliated Individual
-      shirts_sold: !!python/object/apply:decimal.Decimal ["0"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["0"]
+      shirts_sold: !decimal "0"
+      shirt_price: !decimal "0"
       shirt_rate: ""
       status: Payment
       currency: USD
-      invoice_date: !!python/object/apply:datetime.date [2017, 12, 3]
+      invoice_date: !date "2017-12-03"
       payment_id: ch_eishei9aiY8aiqu4lieYiu9i
       stripe_id: ch_eishei9aiY8aiqu4lieYiu9i
       invoice_id: "304"
@@ -341,31 +342,31 @@
   expect:
     - payee: Python Person C
       ledger template: nbpy2017 invoice ledger entry
-      date: !!python/object/apply:datetime.date [2017, 9, 5]
-      amount: !!python/object/apply:decimal.Decimal ["60.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["0"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["0"]
+      date: !date "2017-09-05"
+      amount: !decimal "60.00"
+      tickets_sold: !decimal "0"
+      ticket_price: !decimal "0"
       ticket_rate: Ticket - Talk Proposer
-      shirts_sold: !!python/object/apply:decimal.Decimal ["2"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["30.00"]
+      shirts_sold: !decimal "2"
+      shirt_price: !decimal "30.00"
       shirt_rate: "T-Shirt - Men's/Straight Cut Size M"
       status: Invoice
       currency: USD
-      invoice_date: !!python/object/apply:datetime.date [2017, 9, 5]
+      invoice_date: !date "2017-09-05"
       invoice_id: "11"
     - payee: Python Person C
       ledger template: nbpy2017 payment ledger entry
-      date: !!python/object/apply:datetime.date [2017, 9, 5]
-      amount: !!python/object/apply:decimal.Decimal ["60.00"]
-      tickets_sold: !!python/object/apply:decimal.Decimal ["0"]
-      ticket_price: !!python/object/apply:decimal.Decimal ["0"]
+      date: !date "2017-09-05"
+      amount: !decimal "60.00"
+      tickets_sold: !decimal "0"
+      ticket_price: !decimal "0"
       ticket_rate: Ticket - Talk Proposer
-      shirts_sold: !!python/object/apply:decimal.Decimal ["2"]
-      shirt_price: !!python/object/apply:decimal.Decimal ["30.00"]
+      shirts_sold: !decimal "2"
+      shirt_price: !decimal "30.00"
       shirt_rate: "T-Shirt - Men's/Straight Cut Size M"
       status: Payment
       currency: USD
-      invoice_date: !!python/object/apply:datetime.date [2017, 9, 5]
+      invoice_date: !date "2017-09-05"
       payment_id: ch_daer0ahwoh9oDeiqu2eimoD7
       stripe_id: ch_daer0ahwoh9oDeiqu2eimoD7
       invoice_id: "11"
@@ -376,12 +377,12 @@
   header_cols: 12
   expect:
     - payee: Amazon
-      date: !!python/object/apply:datetime.date [2016, 12, 20]
-      amount: !!python/object/apply:decimal.Decimal ["4.24"]
+      date: !date "2016-12-20"
+      amount: !decimal "4.24"
       currency: USD
     - payee: Amazon
-      date: !!python/object/apply:datetime.date [2017, 1, 7]
-      amount: !!python/object/apply:decimal.Decimal ["-.08"]
+      date: !date "2017-01-07"
+      amount: !decimal "-.08"
       currency: USD
 
 - source: Benevity2018.csv
@@ -389,17 +390,17 @@
   header_rows: 11
   header_cols: 17
   expect:
-    - date: !!python/object/apply:datetime.date [2017, 10, 28]
+    - date: !date "2017-10-28"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [20]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 20
+      match_amount: !decimal 0
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Dakota Smith
       corporation: Company A
@@ -408,16 +409,16 @@
       frequency: One-time
       transaction_id: 67890QWERT
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 30]
+    - date: !date "2017-10-30"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [25]
-      net_amount: !!python/object/apply:decimal.Decimal [25]
-      donation_amount: !!python/object/apply:decimal.Decimal [25]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 25
+      net_amount: !decimal 25
+      donation_amount: !decimal 25
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Dakota Smith
       corporation: Company A
@@ -426,16 +427,16 @@
       frequency: One-time
       transaction_id: 67890WERTY
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [10]
-      net_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 10
+      net_amount: !decimal 10
+      donation_amount: !decimal 0
+      match_amount: !decimal 10
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -444,16 +445,16 @@
       frequency: Unknown
       transaction_id: 67890ERTYU
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 0
+      match_amount: !decimal 20
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -462,17 +463,17 @@
       frequency: Unknown
       transaction_id: 67890RTYUI
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [30]
-      net_amount: !!python/object/apply:decimal.Decimal [30]
-      donation_amount: !!python/object/apply:decimal.Decimal [30]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 30
+      net_amount: !decimal 30
+      donation_amount: !decimal 30
+      match_amount: !decimal 0
       payee: Anonymous
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       corporation: Company B
       project: ""
@@ -486,16 +487,16 @@
   header_rows: 11
   header_cols: 21
   expect:
-    - date: !!python/object/apply:datetime.date [2017, 10, 28]
+    - date: !date "2017-10-28"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [20]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 20
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Dakota Smith
       corporation: Company A
@@ -504,16 +505,16 @@
       frequency: One-time
       transaction_id: 67890QWERT
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 30]
+    - date: !date "2017-10-30"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [25]
-      net_amount: !!python/object/apply:decimal.Decimal [25]
-      donation_amount: !!python/object/apply:decimal.Decimal [25]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 25
+      net_amount: !decimal 25
+      donation_amount: !decimal 25
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Dakota Smith
       corporation: Company A
@@ -522,16 +523,16 @@
       frequency: One-time
       transaction_id: 67890WERTY
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [10]
-      net_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 10
+      net_amount: !decimal 10
+      donation_amount: !decimal 0
+      match_amount: !decimal 10
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -540,16 +541,16 @@
       frequency: Unknown
       transaction_id: 67890ERTYU
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 0
+      match_amount: !decimal 20
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -558,16 +559,16 @@
       frequency: Unknown
       transaction_id: 67890RTYUI
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 19]
+    - date: !date "2017-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [30]
-      net_amount: !!python/object/apply:decimal.Decimal [30]
-      donation_amount: !!python/object/apply:decimal.Decimal [30]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 30
+      net_amount: !decimal 30
+      donation_amount: !decimal 30
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      match_fee: !decimal 0
+      merchant_fee: !decimal 0
       fee_comment: null
       payee: Anonymous
       corporation: Company B
@@ -576,16 +577,16 @@
       frequency: Recurring
       transaction_id: 67890TYUIO
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 18]
+    - date: !date "2017-10-18"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal ["19.55"]
-      donation_amount: !!python/object/apply:decimal.Decimal [10]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [".1"]
-      match_fee: !!python/object/apply:decimal.Decimal [".2"]
-      merchant_fee: !!python/object/apply:decimal.Decimal [".15"]
+      amount: !decimal 20
+      net_amount: !decimal "19.55"
+      donation_amount: !decimal 10
+      match_amount: !decimal 10
+      donation_fee: !decimal ".1"
+      match_fee: !decimal ".2"
+      merchant_fee: !decimal ".15"
       fee_comment: null
       payee: Anonymous
       corporation: Company C
@@ -594,16 +595,16 @@
       frequency: Unknown
       transaction_id: 67890YUIOP
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2017, 10, 21]
+    - date: !date "2017-10-21"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal ["19.55"]
-      donation_amount: !!python/object/apply:decimal.Decimal [10]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [".1"]
-      match_fee: !!python/object/apply:decimal.Decimal [".2"]
-      merchant_fee: !!python/object/apply:decimal.Decimal [".15"]
+      amount: !decimal 20
+      net_amount: !decimal "19.55"
+      donation_amount: !decimal 10
+      match_amount: !decimal 10
+      donation_fee: !decimal ".1"
+      match_fee: !decimal ".2"
+      merchant_fee: !decimal ".15"
       fee_comment: null
       payee: Anonymous
       corporation: Company C
@@ -618,16 +619,16 @@
   header_rows: 11
   header_cols: 23
   expect:
-    - date: !!python/object/apply:datetime.date [2019, 10, 28]
+    - date: !date "2019-10-28"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [20]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 20
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Dakota Smith
       corporation: Company A
@@ -636,16 +637,16 @@
       frequency: One-time
       transaction_id: 67890QWERT
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 30]
+    - date: !date "2019-10-30"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [25]
-      net_amount: !!python/object/apply:decimal.Decimal [25]
-      donation_amount: !!python/object/apply:decimal.Decimal [25]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 25
+      net_amount: !decimal 25
+      donation_amount: !decimal 25
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Dakota Smith
       corporation: Company A
@@ -654,16 +655,16 @@
       frequency: One-time
       transaction_id: 67890WERTY
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 19]
+    - date: !date "2019-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [10]
-      net_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 10
+      net_amount: !decimal 10
+      donation_amount: !decimal 0
+      match_amount: !decimal 10
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company B
@@ -672,16 +673,16 @@
       frequency: Unknown
       transaction_id: 67890ERTYU
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 19]
+    - date: !date "2019-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [20]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal 20
+      donation_amount: !decimal 0
+      match_amount: !decimal 20
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company B
@@ -690,16 +691,16 @@
       frequency: Unknown
       transaction_id: 67890RTYUI
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 19]
+    - date: !date "2019-10-19"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [30]
-      net_amount: !!python/object/apply:decimal.Decimal [30]
-      donation_amount: !!python/object/apply:decimal.Decimal [30]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
-      donation_fee: !!python/object/apply:decimal.Decimal [0]
-      merchant_fee: !!python/object/apply:decimal.Decimal [0]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 30
+      net_amount: !decimal 30
+      donation_amount: !decimal 30
+      match_amount: !decimal 0
+      donation_fee: !decimal 0
+      merchant_fee: !decimal 0
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company B
@@ -708,16 +709,16 @@
       frequency: Recurring
       transaction_id: 67890TYUIO
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 18]
+    - date: !date "2019-10-18"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal ["19.55"]
-      donation_amount: !!python/object/apply:decimal.Decimal [10]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [".3"]
-      merchant_fee: !!python/object/apply:decimal.Decimal [".15"]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal "19.55"
+      donation_amount: !decimal 10
+      match_amount: !decimal 10
+      donation_fee: !decimal ".3"
+      merchant_fee: !decimal ".15"
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company C
@@ -726,16 +727,16 @@
       frequency: Unknown
       transaction_id: 67890YUIOP
       ledger template: benevity donations ledger entry
-    - date: !!python/object/apply:datetime.date [2019, 10, 21]
+    - date: !date "2019-10-21"
       currency: USD
       disbursement_id: ABCDE12345
-      amount: !!python/object/apply:decimal.Decimal [20]
-      net_amount: !!python/object/apply:decimal.Decimal ["19.55"]
-      donation_amount: !!python/object/apply:decimal.Decimal [10]
-      match_amount: !!python/object/apply:decimal.Decimal [10]
-      donation_fee: !!python/object/apply:decimal.Decimal [".3"]
-      merchant_fee: !!python/object/apply:decimal.Decimal [".15"]
-      match_fee: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 20
+      net_amount: !decimal "19.55"
+      donation_amount: !decimal 10
+      match_amount: !decimal 10
+      donation_fee: !decimal ".3"
+      merchant_fee: !decimal ".15"
+      match_fee: !decimal 0
       fee_comment: ""
       payee: Anonymous
       corporation: Company C
@@ -748,9 +749,9 @@
 - source: BrightFunds.xls
   importer: brightfunds.DonorReportXLSImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2017, 10, 20]
+    - date: !date "2017-10-20"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal [120]
+      amount: !decimal 120
       payee: Dakota Smith
       corporation: Company
       company_name: ""
@@ -764,9 +765,9 @@
 - source: BrightFunds.csv
   importer: brightfunds.DonorReportImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2020, 10, 01]
+    - date: !date "2020-10-01"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal [15]
+      amount: !decimal 15
       payee: Company
       corporation: Company
       company_name: Company
@@ -776,9 +777,9 @@
       fund: ""
       on_behalf_of: Employed Person
       type: MatchingTransaction
-    - date: !!python/object/apply:datetime.date [2020, 9, 24]
+    - date: !date "2020-09-24"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal [15]
+      amount: !decimal 15
       payee: Employed Person
       corporation: Company
       company_name: Company
@@ -792,172 +793,172 @@
 - source: OReillyRoyalties.csv
   importer: oreilly.RoyaltiesImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2018, 3, 31]
-      start_date: !!python/object/apply:datetime.date [2018, 3, 1]
+    - date: !date "2018-03-31"
+      start_date: !date "2018-03-01"
       paid_date: null
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["11.96"]
+      amount: !decimal "11.96"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2018, 2, 28]
-      start_date: !!python/object/apply:datetime.date [2018, 2, 1]
-      paid_date: !!python/object/apply:datetime.date [2018, 3, 29]
+    - date: !date "2018-02-28"
+      start_date: !date "2018-02-01"
+      paid_date: !date "2018-03-29"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["20.83"]
+      amount: !decimal "20.83"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2018, 1, 31]
-      start_date: !!python/object/apply:datetime.date [2018, 1, 1]
-      paid_date: !!python/object/apply:datetime.date [2018, 3, 29]
+    - date: !date "2018-01-31"
+      start_date: !date "2018-01-01"
+      paid_date: !date "2018-03-29"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["8.51"]
+      amount: !decimal "8.51"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2017, 3, 31]
-      start_date: !!python/object/apply:datetime.date [2017, 3, 1]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2017-03-31"
+      start_date: !date "2017-03-01"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["26.91"]
+      amount: !decimal "26.91"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2017, 1, 31]
-      start_date: !!python/object/apply:datetime.date [2017, 1, 1]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2017-01-31"
+      start_date: !date "2017-01-01"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["12.33"]
+      amount: !decimal "12.33"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 12, 31]
-      start_date: !!python/object/apply:datetime.date [2016, 12, 1]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2016-12-31"
+      start_date: !date "2016-12-01"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["9.15"]
+      amount: !decimal "9.15"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 9, 30]
-      start_date: !!python/object/apply:datetime.date [2016, 9, 1]
-      paid_date: !!python/object/apply:datetime.date [2016, 12, 16]
+    - date: !date "2016-09-30"
+      start_date: !date "2016-09-01"
+      paid_date: !date "2016-12-16"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["26.19"]
+      amount: !decimal "26.19"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 8, 31]
-      start_date: !!python/object/apply:datetime.date [2016, 8, 1]
-      paid_date: !!python/object/apply:datetime.date [2016, 11, 30]
+    - date: !date "2016-08-31"
+      start_date: !date "2016-08-01"
+      paid_date: !date "2016-11-30"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["27.58"]
+      amount: !decimal "27.58"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2010, 3, 31]
-      start_date: !!python/object/apply:datetime.date [2010, 1, 1]
-      paid_date: !!python/object/apply:datetime.date [2010, 3, 31]
+    - date: !date "2010-03-31"
+      start_date: !date "2010-01-01"
+      paid_date: !date "2010-03-31"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["73.85"]
+      amount: !decimal "73.85"
       payee: "O'Reilly Media, Inc."
 
 - source: OReillyPayments.csv
   importer: oreilly.PaymentsImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2018, 3, 29]
-      paid_date: !!python/object/apply:datetime.date [2018, 3, 29]
+    - date: !date "2018-03-29"
+      paid_date: !date "2018-03-29"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["29.34"]
+      amount: !decimal "29.34"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2017, 4, 27]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2017-04-27"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["26.91"]
+      amount: !decimal "26.91"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2017, 4, 24]
-      paid_date: !!python/object/apply:datetime.date [2017, 4, 28]
+    - date: !date "2017-04-24"
+      paid_date: !date "2017-04-28"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["21.48"]
+      amount: !decimal "21.48"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 12, 16]
-      paid_date: !!python/object/apply:datetime.date [2016, 12, 16]
+    - date: !date "2016-12-16"
+      paid_date: !date "2016-12-16"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["26.19"]
+      amount: !decimal "26.19"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2016, 11, 29]
-      paid_date: !!python/object/apply:datetime.date [2016, 11, 30]
+    - date: !date "2016-11-29"
+      paid_date: !date "2016-11-30"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["27.58"]
+      amount: !decimal "27.58"
       payee: "O'Reilly Media, Inc."
-    - date: !!python/object/apply:datetime.date [2010, 3, 31]
-      paid_date: !!python/object/apply:datetime.date [2010, 3, 31]
+    - date: !date "2010-03-31"
+      paid_date: !date "2010-03-31"
       currency: USD
-      amount: !!python/object/apply:decimal.Decimal ["73.85"]
+      amount: !decimal "73.85"
       payee: "O'Reilly Media, Inc."
 
 - source: YourCause.csv
   importer: yourcause.DonationsImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2018, 12, 20]
+    - date: !date "2018-12-20"
       currency: USD
       original_currency: USD
       payment_id: "10006789"
       transaction_id: 2-34567891
-      amount: !!python/object/apply:decimal.Decimal [12]
-      original_amount: !!python/object/apply:decimal.Decimal [12]
-      received_amount: !!python/object/apply:decimal.Decimal [12]
-      donor_amount: !!python/object/apply:decimal.Decimal [12]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 12
+      original_amount: !decimal 12
+      received_amount: !decimal 12
+      donor_amount: !decimal 12
+      match_amount: !decimal 0
       dedication_type: ""
       dedication: ""
       designation: Note
       payee: Dakota Smith
       donor: Dakota Smith
       corporation: Company A
-    - date: !!python/object/apply:datetime.date [2018, 12, 31]
+    - date: !date "2018-12-31"
       currency: USD
       original_currency: USD
       payment_id: "10006789"
       transaction_id: 2-34567893
-      amount: !!python/object/apply:decimal.Decimal [14]
-      original_amount: !!python/object/apply:decimal.Decimal [14]
-      received_amount: !!python/object/apply:decimal.Decimal [14]
-      donor_amount: !!python/object/apply:decimal.Decimal [14]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal 14
+      original_amount: !decimal 14
+      received_amount: !decimal 14
+      donor_amount: !decimal 14
+      match_amount: !decimal 0
       dedication_type: ""
       dedication: ""
       designation: ""
       payee: Anonymous
       donor: Anonymous
       corporation: Company B
-    - date: !!python/object/apply:datetime.date [2018, 12, 20]
+    - date: !date "2018-12-20"
       currency: USD
       original_currency: USD
       payment_id: "10006789"
       transaction_id: 2-34567895
-      amount: !!python/object/apply:decimal.Decimal [12]
-      original_amount: !!python/object/apply:decimal.Decimal [12]
-      received_amount: !!python/object/apply:decimal.Decimal [12]
-      donor_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [12]
+      amount: !decimal 12
+      original_amount: !decimal 12
+      received_amount: !decimal 12
+      donor_amount: !decimal 0
+      match_amount: !decimal 12
       dedication_type: ""
       dedication: ""
       designation: Note
       payee: Company A
       donor: Dakota Smith
       corporation: Company A
-    - date: !!python/object/apply:datetime.date [2018, 12, 31]
+    - date: !date "2018-12-31"
       currency: USD
       original_currency: USD
       payment_id: "10006789"
       transaction_id: 2-34567897
-      amount: !!python/object/apply:decimal.Decimal [14]
-      original_amount: !!python/object/apply:decimal.Decimal [14]
-      received_amount: !!python/object/apply:decimal.Decimal [14]
-      donor_amount: !!python/object/apply:decimal.Decimal [0]
-      match_amount: !!python/object/apply:decimal.Decimal [14]
+      amount: !decimal 14
+      original_amount: !decimal 14
+      received_amount: !decimal 14
+      donor_amount: !decimal 0
+      match_amount: !decimal 14
       dedication_type: ""
       dedication: ""
       designation: ""
       payee: Company B
       donor: Anonymous
       corporation: Company B
-    - date: !!python/object/apply:datetime.date [2018, 12, 15]
+    - date: !date "2018-12-15"
       currency: USD
       original_currency: GBP
       payment_id: "10006789"
       transaction_id: 2-34567899
-      amount: !!python/object/apply:decimal.Decimal ["12.50"]
-      original_amount: !!python/object/apply:decimal.Decimal [10]
-      received_amount: !!python/object/apply:decimal.Decimal ["12.50"]
-      donor_amount: !!python/object/apply:decimal.Decimal ["12.50"]
-      match_amount: !!python/object/apply:decimal.Decimal [0]
+      amount: !decimal "12.50"
+      original_amount: !decimal 10
+      received_amount: !decimal "12.50"
+      donor_amount: !decimal "12.50"
+      match_amount: !decimal 0
       dedication_type: ""
       dedication: ""
       designation: ""
@@ -968,7 +969,7 @@
 - source: EventBrite.csv
   importer: eventbrite.SalesImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2018, 11, 27]
+    - date: !date "2018-11-27"
       currency: USD
       event_name: First Event
       event_id: "12345678901"
@@ -977,13 +978,13 @@
       payee: Alex Jones
       corporation: ""
       ticket_type: Discount Ticket
-      quantity: !!python/object/apply:decimal.Decimal ["1"]
-      amount: !!python/object/apply:decimal.Decimal ["10"]
-      total_fees: !!python/object/apply:decimal.Decimal ["3.99"]
-      eventbrite_fees: !!python/object/apply:decimal.Decimal ["2.99"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["1"]
-      tax: !!python/object/apply:decimal.Decimal [0]
-    - date: !!python/object/apply:datetime.date [2018, 12, 6]
+      quantity: !decimal "1"
+      amount: !decimal "10"
+      total_fees: !decimal "3.99"
+      eventbrite_fees: !decimal "2.99"
+      payment_fees: !decimal "1"
+      tax: !decimal 0
+    - date: !date "2018-12-06"
       currency: USD
       event_name: First Event
       event_id: "12345678901"
@@ -992,13 +993,13 @@
       payee: Bret Baker
       corporation: ""
       ticket_type: Regular Ticket
-      quantity: !!python/object/apply:decimal.Decimal ["1"]
-      amount: !!python/object/apply:decimal.Decimal ["30"]
-      total_fees: !!python/object/apply:decimal.Decimal ["3.99"]
-      eventbrite_fees: !!python/object/apply:decimal.Decimal ["2.99"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["1"]
-      tax: !!python/object/apply:decimal.Decimal [0]
-    - date: !!python/object/apply:datetime.date [2019, 1, 7]
+      quantity: !decimal "1"
+      amount: !decimal "30"
+      total_fees: !decimal "3.99"
+      eventbrite_fees: !decimal "2.99"
+      payment_fees: !decimal "1"
+      tax: !decimal 0
+    - date: !date "2019-01-07"
       currency: USD
       event_name: First Event
       event_id: "12345678901"
@@ -1007,13 +1008,13 @@
       payee: Cam Smith
       corporation: SampleCo
       ticket_type: Premium Ticket
-      quantity: !!python/object/apply:decimal.Decimal ["1"]
-      amount: !!python/object/apply:decimal.Decimal ["60"]
-      total_fees: !!python/object/apply:decimal.Decimal ["6.39"]
-      eventbrite_fees: !!python/object/apply:decimal.Decimal ["4.39"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["2"]
-      tax: !!python/object/apply:decimal.Decimal [0]
-    - date: !!python/object/apply:datetime.date [2019, 1, 23]
+      quantity: !decimal "1"
+      amount: !decimal "60"
+      total_fees: !decimal "6.39"
+      eventbrite_fees: !decimal "4.39"
+      payment_fees: !decimal "2"
+      tax: !decimal 0
+    - date: !date "2019-01-23"
       currency: EUR
       event_name: Second Event
       event_id: "12345678902"
@@ -1022,34 +1023,34 @@
       payee: Jam Jones
       corporation: ""
       ticket_type: Discount Ticket
-      quantity: !!python/object/apply:decimal.Decimal ["1"]
-      amount: !!python/object/apply:decimal.Decimal ["25"]
-      total_fees: !!python/object/apply:decimal.Decimal ["3.99"]
-      eventbrite_fees: !!python/object/apply:decimal.Decimal ["2.99"]
-      payment_fees: !!python/object/apply:decimal.Decimal ["1"]
-      tax: !!python/object/apply:decimal.Decimal [0]
+      quantity: !decimal "1"
+      amount: !decimal "25"
+      total_fees: !decimal "3.99"
+      eventbrite_fees: !decimal "2.99"
+      payment_fees: !decimal "1"
+      tax: !decimal 0
 
 - source: GitHubSponsors.csv
   importer: github.SponsorsImporter
   expect:
-    - date: !!python/object/apply:datetime.date [2020, 1, 2]
+    - date: !date "2020-01-02"
       payee: exampleA
       handle: exampleA
       email: ajones@example.com
       transaction_id: ch_1Gabcdefghijklmnopqrstuv
-      amount: !!python/object/apply:decimal.Decimal ["1"]
+      amount: !decimal "1"
       currency: USD
-    - date: !!python/object/apply:datetime.date [2020, 1, 3]
+    - date: !date "2020-01-03"
       payee: exampleB
       handle: exampleB
       email: ""
       transaction_id: 1023ABCD5678EFGHI
-      amount: !!python/object/apply:decimal.Decimal ["10"]
+      amount: !decimal "10"
       currency: USD
-    - date: !!python/object/apply:datetime.date [2020, 1, 4]
+    - date: !date "2020-01-04"
       payee: exampleC
       handle: exampleC
       email: info@example.com
       transaction_id: ch_1Gabcdefghijklmnopqrstuw
-      amount: !!python/object/apply:decimal.Decimal ["120"]
+      amount: !decimal "120"
       currency: USD
diff --git a/tests/test_importers.py b/tests/test_importers.py
index 01d66e6..605cffe 100644
--- a/tests/test_importers.py
+++ b/tests/test_importers.py
@@ -6,7 +6,6 @@ import importlib
 import itertools
 import pathlib
 import shutil
-import re
 
 import pytest
 import yaml
@@ -14,14 +13,23 @@ from import2ledger import importers, strparse
 
 from . import DATA_DIR
 
-try:
-    load_yaml = yaml.full_load
-except AttributeError:
-    load_yaml = yaml.load
+
+def decimal_constructor(loader, node):
+    value = loader.construct_scalar(node)
+    return decimal.Decimal(value)
+
+
+def date_constructor(loader, node):
+    value = loader.construct_scalar(node)
+    return datetime.date.fromisoformat(value)
+
 
 class TestImporters:
+    Loader = yaml.Loader
+    Loader.add_constructor('!decimal', decimal_constructor)
+    Loader.add_constructor('!date', date_constructor)
     with pathlib.Path(DATA_DIR, 'imports.yml').open() as yaml_file:
-        test_data = load_yaml(yaml_file)
+        test_data = yaml.load(yaml_file, Loader=Loader)
     for test in test_data:
         test['source'] = DATA_DIR / test['source']