diff --git a/tests/test_CacheWriter.py b/tests/test_CacheWriter.py
index 4023a4e..47a5ccd 100644
--- a/tests/test_CacheWriter.py
+++ b/tests/test_CacheWriter.py
@@ -11,7 +11,7 @@ import oxrlib.errors
 CACHE_PATH = relpath('writecache')
 HISTORICAL_PATTERN = '{date}_{base}_cache.json'
 
-class TestCacheFile(oxrlib.cache.WriteCacheFile):
+class FakeCacheFile(oxrlib.cache.WriteCacheFile):
     def __init__(self, path, *args, **kwargs):
         self.path = path
         assert args[0].startswith('w')
@@ -31,7 +31,7 @@ class FakeRate:
 
 @pytest.fixture
 def dummycache():
-    cache = oxrlib.cache.CacheWriter(CACHE_PATH, file_class=TestCacheFile)
+    cache = oxrlib.cache.CacheWriter(CACHE_PATH, file_class=FakeCacheFile)
     cache.setup(historical=HISTORICAL_PATTERN)
     return cache
 
@@ -44,4 +44,4 @@ def test_cache_success(dummycache, any_date):
 def test_save_rate(dummycache, any_date):
     rate = FakeRate(any_date, 'USD')
     dummycache.save_rate(rate)
-    assert TestCacheFile.last_file.last_value == json.dumps(rate.serialize())
+    assert FakeCacheFile.last_file.last_value == json.dumps(rate.serialize())