diff --git a/test/resources/isort_stdlib_transition.py b/test/resources/isort_stdlib_transition.py
new file mode 100644
index 000000000..ead219c07
--- /dev/null
+++ b/test/resources/isort_stdlib_transition.py
@@ -0,0 +1,4 @@
+"""Formatting fixture for modules removed from the Python standard library."""
+
+import cgi  # noqa: F401
+import json  # noqa: F401