diff --git a/packages/utils/mocks/sink.mock.ts b/packages/utils/mocks/sink.mock.ts
index 22b06b5b9..13d89e91c 100644
--- a/packages/utils/mocks/sink.mock.ts
+++ b/packages/utils/mocks/sink.mock.ts
@@ -1,4 +1,4 @@
-import type { Sink } from '../src/lib/sink-source.types';
+import type { Sink } from '../src/lib/sink-source.type';
 
 export class MockSink implements Sink<string, string> {
   private writtenItems: string[] = [];
diff --git a/packages/utils/src/lib/performance-observer.ts b/packages/utils/src/lib/performance-observer.ts
index 6b360d0da..69a614d84 100644
--- a/packages/utils/src/lib/performance-observer.ts
+++ b/packages/utils/src/lib/performance-observer.ts
@@ -5,7 +5,7 @@ import {
   type PerformanceObserverEntryList,
   performance,
 } from 'node:perf_hooks';
-import type { Buffered, Encoder, Observer, Sink } from './sink-source.types.js';
+import type { Buffered, Encoder, Observer, Sink } from './sink-source.type';
 
 export const DEFAULT_FLUSH_THRESHOLD = 20;
 
diff --git a/packages/utils/src/lib/sink-source.types.ts b/packages/utils/src/lib/sink-source.type.ts
similarity index 100%
rename from packages/utils/src/lib/sink-source.types.ts
rename to packages/utils/src/lib/sink-source.type.ts
diff --git a/testing/test-setup-config/src/lib/vitest-config-factory.ts b/testing/test-setup-config/src/lib/vitest-config-factory.ts
index 66e349ed1..0723f72b3 100644
--- a/testing/test-setup-config/src/lib/vitest-config-factory.ts
+++ b/testing/test-setup-config/src/lib/vitest-config-factory.ts
@@ -31,7 +31,33 @@ function buildCoverageConfig(
     return undefined;
   }
 
-  const exclude = ['mocks/**', '**/types.ts', 'perf/**'];
+  const exclude = [
+    'tests/**',
+    'perf/**',
+    // Mocks and fixtures
+    'mocks/**',
+    '**/fixtures/**',
+    '**/*.mock.ts',
+    '**/*.fixture.ts',
+    // Config files
+    '**/vitest.*.config.ts',
+    '**/vitest.config.ts',
+    '**/code-pushup.config.ts',
+    '**/*.config.ts',
+    // Barrel files (index files that only re-export)
+    '**/index.ts',
+    '**/index.js',
+    '**/index.mjs',
+    // Model files
+    '**/models.ts',
+    '**/*.model.ts',
+    '**/types.ts',
+    '**/*.type.ts',
+    // Constants
+    '**/constants.ts',
+    // typings
+    '**/*.d.ts',
+  ];
   const reportsDirectory = `../../coverage/${projectKey}/${kind}-tests`;
 
   return {
diff --git a/testing/test-setup-config/src/lib/vitest-config-factory.unit.test.ts b/testing/test-setup-config/src/lib/vitest-config-factory.unit.test.ts
index 3afa4b1fa..a92a3e4bf 100644
--- a/testing/test-setup-config/src/lib/vitest-config-factory.unit.test.ts
+++ b/testing/test-setup-config/src/lib/vitest-config-factory.unit.test.ts
@@ -38,7 +38,27 @@ describe('createVitestConfig', () => {
           coverage: expect.objectContaining({
             reporter: ['text', 'lcov'],
             reportsDirectory: '../../coverage/test-package/unit-tests',
-            exclude: ['mocks/**', '**/types.ts', 'perf/**'],
+            exclude: [
+              'tests/**',
+              'perf/**',
+              'mocks/**',
+              '**/fixtures/**',
+              '**/*.mock.ts',
+              '**/*.fixture.ts',
+              '**/vitest.*.config.ts',
+              '**/vitest.config.ts',
+              '**/code-pushup.config.ts',
+              '**/*.config.ts',
+              '**/index.ts',
+              '**/index.js',
+              '**/index.mjs',
+              '**/models.ts',
+              '**/*.model.ts',
+              '**/types.ts',
+              '**/*.type.ts',
+              '**/constants.ts',
+              '**/*.d.ts',
+            ],
           }),
           typecheck: { include: ['**/*.type.test.ts'] },
         }),
@@ -270,9 +290,25 @@ describe('createVitestConfig', () => {
       const config = createVitestConfig('test-package', 'unit');
 
       expect(config.test!.coverage!.exclude).toEqual([
+        'tests/**',
+        'perf/**',
         'mocks/**',
+        '**/fixtures/**',
+        '**/*.mock.ts',
+        '**/*.fixture.ts',
+        '**/vitest.*.config.ts',
+        '**/vitest.config.ts',
+        '**/code-pushup.config.ts',
+        '**/*.config.ts',
+        '**/index.ts',
+        '**/index.js',
+        '**/index.mjs',
+        '**/models.ts',
+        '**/*.model.ts',
         '**/types.ts',
-        'perf/**',
+        '**/*.type.ts',
+        '**/constants.ts',
+        '**/*.d.ts',
       ]);
     });
   });