diff --git a/IPython/core/tests/test_shellapp.py b/IPython/core/tests/test_shellapp.py
index 32a6aee..9f4f87b 100644
--- a/IPython/core/tests/test_shellapp.py
+++ b/IPython/core/tests/test_shellapp.py
@@ -48,6 +48,9 @@ class TestFileToRun(tt.TempFileMixin, unittest.TestCase):
         src = "True\n"
         self.mktmp(src)
 
-        out, err = tt.ipexec(self.fname, options=['-i'],
-                           commands=['"__file__" in globals()', 'print(123)', 'exit()'])
+        out, err = tt.ipexec(
+            self.fname,
+            options=["-i"],
+            commands=['"__file__" in globals()', "print(123)", "exit()"],
+        )
         assert "False" in out, f"Subprocess stderr:\n{err}\n-----"