diff --git a/array_api_tests/test_signatures.py b/array_api_tests/test_signatures.py
index dc760b8a..b109ebd0 100644
--- a/array_api_tests/test_signatures.py
+++ b/array_api_tests/test_signatures.py
@@ -135,6 +135,7 @@ def make_pretty_func(func_name: str, *args: Any, **kwargs: Any) -> str:
         "solve": {
             a: "xp.asarray([[1, 2], [3, 4]], dtype=xp.float64)" for a in ["x1", "x2"]
         },
+        "outer": {"x1": "xp.ones((5,))", "x2": "xp.ones((5,))"},
     },
 )
 # We default most array arguments heuristically. As functions/methods work only