diff --git a/python_modules/dagster/dagster_tests/core_tests/execution_tests/test_asset_execution_context.py b/python_modules/dagster/dagster_tests/core_tests/execution_tests/test_asset_execution_context.py
index 55d127c3ba1a6..9e19b237cf5b6 100644
--- a/python_modules/dagster/dagster_tests/core_tests/execution_tests/test_asset_execution_context.py
+++ b/python_modules/dagster/dagster_tests/core_tests/execution_tests/test_asset_execution_context.py
@@ -141,13 +141,13 @@ def test_instance_check():
 
     @asset
     def test_op_context_instance_check(context: AssetExecutionContext):
-        isinstance(context, OpExecutionContext)
+        assert isinstance(context, OpExecutionContext)
 
     with pytest.raises(DeprecationWarning):
         materialize([test_op_context_instance_check])
 
     @asset
     def test_asset_context_instance_check(context: AssetExecutionContext):
-        isinstance(context, AssetExecutionContext)
+        assert isinstance(context, AssetExecutionContext)
 
     assert materialize([test_asset_context_instance_check]).success