diff --git a/python-checks/src/test/java/org/sonar/python/checks/UnusedFunctionParameterCheckTest.java b/python-checks/src/test/java/org/sonar/python/checks/UnusedFunctionParameterCheckTest.java
index d7a210e813..f111becb6d 100644
--- a/python-checks/src/test/java/org/sonar/python/checks/UnusedFunctionParameterCheckTest.java
+++ b/python-checks/src/test/java/org/sonar/python/checks/UnusedFunctionParameterCheckTest.java
@@ -33,7 +33,10 @@ void test() {
   @Test
   void test_import() {
     PythonCheckVerifier.verify(
-      List.of("src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImport.py","src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImported.py"),
+      List.of(
+        "src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImport.py",
+        "src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImported.py"
+      ),
       new UnusedFunctionParameterCheck()
     );
   }
diff --git a/python-checks/src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImport.py b/python-checks/src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImport.py
index 1c851d3b83..0541b5bfbe 100644
--- a/python-checks/src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImport.py
+++ b/python-checks/src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImport.py
@@ -1,7 +1,8 @@
-from unusedFunctionParameterImported import ImportedParent
+from unusedFunctionParameterImported import ImportedParent, ParentWithDuplicatedParent
+
 class ChildFromImported(ImportedParent):
 
-    # SONARPY-2327 `method_defined_in_child_class_only` is not considered a member of ImportedParent class, thus S1172 is raised
+    # SONARPY-1829 `method_defined_in_child_class_only` is not considered a member of ImportedParent class, thus S1172 is raised
     def method_defined_in_child_class_only(self, a): # Noncompliant
         #                                        ^
         return compute()
@@ -9,3 +10,9 @@ def method_defined_in_child_class_only(self, a): # Noncompliant
     def method_defined_in_child_class_only_and_not_used(self, a): # Noncompliant
         #                                                     ^
         return compute()
+
+class ChildFromDuplicated(ParentWithDuplicatedParent):
+
+    def do_something(self, a): # FN SONARPY-1829 ChildFromDuplicated has an unresolved type hierarchy, because of the duplicated parent classes
+        return compute()
+
diff --git a/python-checks/src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImported.py b/python-checks/src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImported.py
index d952cbbf96..83be1ded3c 100644
--- a/python-checks/src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImported.py
+++ b/python-checks/src/test/resources/checks/unusedFunctionParameter/unusedFunctionParameterImported.py
@@ -1,3 +1,12 @@
 class ImportedParent:
     def using_child_method(self):
         return self.method_defined_in_child_class_only(1,2)
+
+class DuplicatedParent:
+    ...
+
+class DuplicatedParent:
+    ...
+
+class ParentWithDuplicatedParent(DuplicatedParent):
+    ...