diff --git a/tests/packages/test_locker.py b/tests/packages/test_locker.py
index e115c32c799..d6e59b0d20a 100644
--- a/tests/packages/test_locker.py
+++ b/tests/packages/test_locker.py
@@ -647,11 +647,11 @@ def test_reading_lock_file_should_raise_an_error_on_missing_metadata(
     with pytest.raises(RuntimeError) as e:
         _ = locker.lock_data
 
-    assert (
-        "The lock file does not have a metadata entry.\nRegenerate the lock file with"
-        " the `poetry lock` command."
-        in str(e.value)
-    )
+        assert (
+            "The lock file does not have a metadata entry.\nRegenerate the lock file with"
+            " the `poetry lock` command."
+            in str(e.value)
+        )
 
 
 def test_locking_legacy_repository_package_should_include_source_section(