1 files changed, 64 insertions, 0 deletions
diff --git a/tests/functional/a/access/access_to_protected_members.py b/tests/functional/a/access/access_to_protected_members.py
index ffbfabf15..7d732dcc5 100644
--- a/tests/functional/a/access/access_to_protected_members.py
+++ b/tests/functional/a/access/access_to_protected_members.py
@@ -211,3 +211,67 @@ class Issue1159Subclass(Issue1159):
         instance = Issue1159OtherClass()
         instance._bar = 3  # [protected-access]
         _ = instance._foo  # [protected-access]
+
+
+class Issue3066:
+    """Test for GitHub issue 3066
+    Accessing of attributes/methods of inner and outer classes
+    https://github.com/PyCQA/pylint/issues/3066"""
+
+    attr = 0
+    _attr = 1
+
+    @staticmethod
+    def _bar(i):
+        """Docstring."""
+
+    @staticmethod
+    def foobar(i):
+        """Test access from outer class"""
+        Issue3066._attr = 2
+        Issue3066.Aclass._attr = "y"  # [protected-access]
+        Issue3066.Aclass.Bclass._attr = "b"  # [protected-access]
+
+        Issue3066._bar(i)
+        Issue3066.Aclass._bar(i)  # [protected-access]
+        Issue3066.Aclass.Bclass._bar(i)  # [protected-access]
+
+    class Aclass:
+        """Inner class for GitHub issue 3066"""
+
+        _attr = "x"
+
+        @staticmethod
+        def foobar(i):
+            """Test access from inner class"""
+            Issue3066._attr = 2  # [protected-access]
+            Issue3066.Aclass._attr = "y"
+            Issue3066.Aclass.Bclass._attr = "b"  # [protected-access]
+
+            Issue3066._bar(i)  # [protected-access]
+            Issue3066.Aclass._bar(i)
+            Issue3066.Aclass.Bclass._bar(i)  # [protected-access]
+
+        @staticmethod
+        def _bar(i):
+            """Docstring."""
+
+        class Bclass:
+            """Inner inner class for GitHub issue 3066"""
+
+            _attr = "a"
+
+            @staticmethod
+            def foobar(i):
+                """Test access from inner inner class"""
+                Issue3066._attr = 2  # [protected-access]
+                Issue3066.Aclass._attr = "y"  # [protected-access]
+                Issue3066.Aclass.Bclass._attr = "b"
+
+                Issue3066._bar(i)  # [protected-access]
+                Issue3066.Aclass._bar(i)  # [protected-access]
+                Issue3066.Aclass.Bclass._bar(i)
+
+            @staticmethod
+            def _bar(i):
+                """Docstring."""