diff --git a/tests/patterns/astropy_types_test.py b/tests/patterns/astropy_types_test.py
index 1f26b63..4c35af4 100644
--- a/tests/patterns/astropy_types_test.py
+++ b/tests/patterns/astropy_types_test.py
@@ -35,7 +35,7 @@ class TestExtension(Extension):
 
 
 def test_convert_DataPoint_to_asdf(tmp_path):
-    af = asdf.AsdfFile(
+    asdf.AsdfFile(
         {
             "positions": [
                 DataPoint(
@@ -57,7 +57,7 @@ def test_convert_DataPoint_to_asdf(tmp_path):
 
 
 def test_convert_DataContainer_to_asdf(tmp_path):
-    af = asdf.AsdfFile(
+    asdf.AsdfFile(
         {
             "container": DataContainer(
                 positions=[