diff --git a/test_functions.cpp b/test_functions.cpp
index 33c5151e..22a7dcd4 100644
--- a/test_functions.cpp
+++ b/test_functions.cpp
@@ -468,7 +468,6 @@ TEST_CASE("functions/all-kinds", "Register all kinds of functions, make sure the
     lua.set_function("l", sol::c_call<decltype(&test_1::a), &test_1::a>);
     lua.set_function("m", &test_2::a, &t2);
     lua.set_function("n", sol::c_call<decltype(&test_1::x_bark), &test_1::x_bark>);
-    lua.set_function("o", sol::c_call<decltype(test_1::x_bark), test_1::x_bark>);
 
     lua.script(R"(
 o1 = test_1.new()