diff --git a/.gitignore b/.gitignore
index b3bfe992..67f62b60 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,4 +10,7 @@ build/
 coverage/
 
 # ignore generated mocks
-**/*.mocks.dart
\ No newline at end of file
+**/*.mocks.dart
+
+# ide folders
+.idea
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 55253622..83dfa5c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 5.4.5-wip
+
+* Allow usage of GetMock superclasses.
+
 ## 5.4.4
 
 * Use `posix` style for local imports.
diff --git a/lib/src/builder.dart b/lib/src/builder.dart
index 381b3a84..dbe9b572 100644
--- a/lib/src/builder.dart
+++ b/lib/src/builder.dart
@@ -574,6 +574,11 @@ class _MockTargetGatherer {
       int index,
       List<ast.CollectionElement> mockSpecAsts,
       {bool nice = false}) {
+    // need to get the parent until type name is not MockSpec to allow inheritance
+    while (mockSpec.type?.element?.name != "MockSpec") {
+      mockSpec = mockSpec.getField("(super)")!;
+    }
+
     final mockSpecType = mockSpec.type as analyzer.InterfaceType;
     assert(mockSpecType.typeArguments.length == 1);
     final mockType = _mockType(mockSpecAsts[index]);
@@ -681,10 +686,10 @@ class _MockTargetGatherer {
       throw InvalidMockitoAnnotationException(
           'The GenerateNiceMocks "mockSpecs" argument is missing');
     }
-    final mockSpecAsts = _niceMocksAst(annotation.annotationAst).elements;
+    final mockSpecAsts =
+        _niceMocksAst(annotation.annotationAst).elements.toList();
     return mockSpecsField.toListValue()!.mapIndexed((index, mockSpec) =>
-        _mockTargetFromMockSpec(
-            mockSpec, entryLib, index, mockSpecAsts.toList(),
+        _mockTargetFromMockSpec(mockSpec, entryLib, index, mockSpecAsts,
             nice: true));
   }
 
diff --git a/pubspec.yaml b/pubspec.yaml
index e5585b58..0d4894e4 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: mockito
-version: 5.4.4
+version: 5.4.5-wip
 description: >-
   A mock framework inspired by Mockito with APIs for Fakes, Mocks,
   behavior verification, and stubbing.