1 files changed, 8 insertions, 0 deletions
diff --git a/tests/roots/test-ext-autodoc/target/singledispatch.py b/tests/roots/test-ext-autodoc/target/singledispatch.py
index c33d001b1..33dcae43a 100644
--- a/tests/roots/test-ext-autodoc/target/singledispatch.py
+++ b/tests/roots/test-ext-autodoc/target/singledispatch.py
@@ -1,4 +1,11 @@
 from functools import singledispatch
+import inspect
+
+
+def assign_signature(func):
+    # This is intended to cover more complex signature-rewriting decorators.
+    func.__signature__ = inspect.signature(func)
+    return func
 
 
 @singledispatch
@@ -14,6 +21,7 @@ def _func_int(arg, kwarg=None):
 
 
 @func.register(str)
+@assign_signature
 def _func_str(arg, kwarg=None):
     """A function for str."""
     pass