diff --git a/mypy/test/test_scope_behavior.py b/mypy/test/test_scope_behavior.py
new file mode 100644
index 000000000000..074285b23c3c
--- /dev/null
+++ b/mypy/test/test_scope_behavior.py
@@ -0,0 +1,18 @@
+from mypy.nodes import FuncDef, SymbolTable, TypeInfo
+from mypy.scope import Scope
+
+
+def test_scope_module_and_function_behavior() -> None:
+    scope = Scope()
+    with scope.module_scope("mod1"):
+        assert scope.current_module_id() == "mod1"
+        # simulate function
+        fake_func = FuncDef("f", None, None, None, None)
+        with scope.function_scope(fake_func):
+            assert "f" in scope.current_full_target()
+            # simulate class inside function
+            fake_class = TypeInfo(SymbolTable(), "C", None)
+            with scope.class_scope(fake_class):
+                assert "C" in scope.current_full_target()
+        # leaving function restores module
+        assert scope.current_full_target() == "mod1"