diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index fa2d199..94d7cec 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,12 @@
 # RELEASE NOTES
 
+***********************
+# testflo version 1.4.21
+February 6, 2026
+
+- Fixed a double initialization issue when coverage was active [#128](https://github.com/OpenMDAO/testflo/pull/128)
+
+
 ***********************
 # testflo version 1.4.20
 June 27, 2025
diff --git a/testflo/tests/test_nested_fixtures.py b/testflo/tests/test_nested_fixtures.py
index c82ae58..5a4c89d 100644
--- a/testflo/tests/test_nested_fixtures.py
+++ b/testflo/tests/test_nested_fixtures.py
@@ -61,3 +61,7 @@ def test_3(self):
 
     def test_4(self):
         self.fail("This test should have been skipped.")
+
+
+if __name__ == '__main__':
+    unittest.main()