diff --git a/tests/functional/syntax/test_interfaces.py b/tests/functional/syntax/test_interfaces.py
index baf0c73c30..ecd4ef6b91 100644
--- a/tests/functional/syntax/test_interfaces.py
+++ b/tests/functional/syntax/test_interfaces.py
@@ -621,3 +621,31 @@ def bar():
     # TODO make the exception more precise once fixed
     with pytest.raises(Exception):  # noqa: B017
         compiler.compile_code(main, input_bundle=input_bundle)
+
+
+def test_interface_name_in_signature_is_short(make_input_bundle):
+    foo = """
+from ethereum.ercs import IERC20
+
+def foobar(token: IERC20):
+    ...
+        """
+    code = """
+from ethereum.ercs import IERC20
+import foo as Foo
+implements: Foo
+
+@internal
+def foobar(token: IERC20):
+    pass
+        """
+
+    input_bundle = make_input_bundle({"foo.vyi": foo})
+
+    with pytest.raises(InterfaceViolation) as e:
+        compiler.compile_code(code, input_bundle=input_bundle)
+
+    assert (
+        e.value.message
+        == "Contract does not implement all interface functions: foobar(IERC20)"
+    )
diff --git a/vyper/semantics/types/function.py b/vyper/semantics/types/function.py
index ffeb5b7299..0a5d0d354d 100644
--- a/vyper/semantics/types/function.py
+++ b/vyper/semantics/types/function.py
@@ -209,7 +209,7 @@ def __str__(self):
 
     @cached_property
     def _pp_signature(self):
-        ret = ",".join(repr(arg.typ) for arg in self.arguments)
+        ret = ",".join(str(arg.typ) for arg in self.arguments)
         return f"{self.name}({ret})"
 
     # override parent implementation. function type equality does not
diff --git a/vyper/semantics/types/module.py b/vyper/semantics/types/module.py
index 498757b94e..29ff0d8d2c 100644
--- a/vyper/semantics/types/module.py
+++ b/vyper/semantics/types/module.py
@@ -1,4 +1,5 @@
 from functools import cached_property
+from pathlib import Path
 from typing import TYPE_CHECKING, Optional
 
 from vyper import ast as vy_ast
@@ -79,7 +80,7 @@ def abi_type(self) -> ABIType:
         return ABI_Address()
 
     def __str__(self):
-        return self._id
+        return Path(self._id).stem
 
     def __repr__(self):
         return f"interface {self._id}"