diff --git a/registrasion/controllers/conditions.py b/registrasion/controllers/conditions.py
index 63362a28..7243737a 100644
--- a/registrasion/controllers/conditions.py
+++ b/registrasion/controllers/conditions.py
@@ -158,7 +158,7 @@ class CategoryConditionController(ConditionController):
             category=self.condition.enabling_category,
         )
         products_count = rego.ProductItem.objects.filter(
-            cart=carts,
+            cart__in=carts,
             product__in=enabling_products,
         ).count()
         return products_count > 0
@@ -177,7 +177,7 @@ class ProductConditionController(ConditionController):
 
         carts = rego.Cart.objects.filter(user=user, released=False)
         products_count = rego.ProductItem.objects.filter(
-            cart=carts,
+            cart__in=carts,
             product__in=self.condition.enabling_products.all(),
         ).count()
         return products_count > 0
@@ -247,7 +247,7 @@ class TimeOrStockLimitConditionController(ConditionController):
         product_items = rego.ProductItem.objects.filter(
             product__in=self._products().all(),
         )
-        product_items = product_items.filter(cart=reserved_carts)
+        product_items = product_items.filter(cart__in=reserved_carts)
 
         count = product_items.aggregate(Sum("quantity"))["quantity__sum"] or 0
 
diff --git a/registrasion/tests/test_cart.py b/registrasion/tests/test_cart.py
index bc58d5fb..c203c9b7 100644
--- a/registrasion/tests/test_cart.py
+++ b/registrasion/tests/test_cart.py
@@ -72,6 +72,15 @@ class RegistrationCartTestCase(SetTimeMixin, TestCase):
         cls.PROD_4.price = Decimal("5.00")
         cls.PROD_4.save()
 
+        # Burn through some carts -- this made some past EC tests fail
+        current_cart = CartController.for_user(cls.USER_1)
+        current_cart.cart.active = False
+        current_cart.cart.save()
+
+        current_cart = CartController.for_user(cls.USER_2)
+        current_cart.cart.active = False
+        current_cart.cart.save()
+
     @classmethod
     def make_ceiling(cls, name, limit=None, start_time=None, end_time=None):
         limit_ceiling = rego.TimeOrStockLimitEnablingCondition.objects.create(