diff --git a/tests/requirements/compile.py b/tests/requirements/compile.py
index 2a3a1d9..d19e98c 100755
--- a/tests/requirements/compile.py
+++ b/tests/requirements/compile.py
@@ -80,7 +80,7 @@ def run(*args, **kwargs):
     ] + sys.argv[1:]
 
     print("Upgrading pip-tools")
-    for py_ver in set(key.split("-")[0] for key in COMPILE_SETTINGS.keys()):
+    for py_ver in {key.split("-")[0] for key in COMPILE_SETTINGS.keys()}:
         args = [f"python{py_ver[2]}.{py_ver[3:]}", "-m", "pip", "install", "--upgrade", "pip-tools"]
         subprocess.run(args, capture_output=True)