diff --git a/system_tests/noxfile.py b/system_tests/noxfile.py
index 0f852ea..699a1b3 100644
--- a/system_tests/noxfile.py
+++ b/system_tests/noxfile.py
@@ -315,7 +315,7 @@
     session.env[EXPECT_PROJECT_ENV] = "1"
     session.install(*(TEST_DEPENDENCIES_SYNC + TEST_DEPENDENCIES_ASYNC))
     session.install(LIBRARY_DIR)
-    session.run("pytest", "system_tests_async/test_default.py", 
+    session.run("pytest", "system_tests_async/test_default.py",
     "system_tests_async/test_id_token.py")