diff --git a/tests/unit/flexible-instance-security-advanced.test.ts b/tests/unit/flexible-instance-security-advanced.test.ts
index 2b6ca8d..b929479 100644
--- a/tests/unit/flexible-instance-security-advanced.test.ts
+++ b/tests/unit/flexible-instance-security-advanced.test.ts
@@ -21,7 +21,7 @@ vi.mock('../../src/utils/logger');
 describe('Advanced Security and Error Handling Tests', () => {
   let mockN8nApiClient: Mock;
   let mockGetN8nApiConfigFromContext: Mock;
-  let mockLogger: Mock;
+  let mockLogger: any; // Logger mock has complex type
 
   beforeEach(() => {
     vi.resetAllMocks();
diff --git a/tests/unit/mcp/handlers-n8n-manager-simple.test.ts b/tests/unit/mcp/handlers-n8n-manager-simple.test.ts
index af2ac9b..4045a02 100644
--- a/tests/unit/mcp/handlers-n8n-manager-simple.test.ts
+++ b/tests/unit/mcp/handlers-n8n-manager-simple.test.ts
@@ -187,7 +187,7 @@ describe('handlers-n8n-manager Simple Coverage Tests', () => {
 
   describe('Array and Object Handling', () => {
     it('should handle undefined array lengths', () => {
-      const workflowData = {
+      const workflowData: { nodes?: any[] } = {
         nodes: undefined
       };
 
@@ -283,7 +283,7 @@ describe('handlers-n8n-manager Simple Coverage Tests', () => {
     });
 
     it('should handle missing dependencies', () => {
-      const packageJson = {};
+      const packageJson: { dependencies?: { n8n?: string } } = {};
 
       const supportedVersion = packageJson.dependencies?.n8n?.replace(/[^0-9.]/g, '') || '';
 
diff --git a/tests/unit/mcp/lru-cache-behavior.test.ts b/tests/unit/mcp/lru-cache-behavior.test.ts
index d652178..53e91cf 100644
--- a/tests/unit/mcp/lru-cache-behavior.test.ts
+++ b/tests/unit/mcp/lru-cache-behavior.test.ts
@@ -28,7 +28,7 @@ vi.mock('../../../src/types/instance-context', async () => {
 describe('LRU Cache Behavior Tests', () => {
   let mockN8nApiClient: Mock;
   let mockGetN8nApiConfigFromContext: Mock;
-  let mockLogger: Mock;
+  let mockLogger: any; // Logger mock has complex type
   let mockValidateInstanceContext: Mock;
 
   beforeEach(() => {