diff --git a/test/test_corpus.py b/test/test_corpus.py
index e86b3595..e0628dc1 100644
--- a/test/test_corpus.py
+++ b/test/test_corpus.py
@@ -90,7 +90,9 @@
 def test_copus(tmp_path, url, config_file, flags):
     os.chdir(tmp_path)
 
-    subprocess.run(f"git clone --recurse-submodules --depth=1 {url}", check=True, shell=True)
+    subprocess.run(
+        f"git clone --recurse-submodules --depth=1 {url}", check=True, shell=True
+    )
 
     with pytest.MonkeyPatch.context() as m:
         command = f"ford {flags} {config_file}"