diff --git a/apps/server/tests/unit/lib/logger.test.ts b/apps/server/tests/unit/lib/logger.test.ts
index 0559d157..234a7373 100644
--- a/apps/server/tests/unit/lib/logger.test.ts
+++ b/apps/server/tests/unit/lib/logger.test.ts
@@ -78,11 +78,12 @@ describe('logger.ts', () => {
 
       setLogLevel(LogLevel.ERROR);
       logger.warn('warn message 1');
-      expect(consoleSpy.warn).not.toHaveBeenCalled();
+      expect(consoleSpy.log).not.toHaveBeenCalled();
 
       setLogLevel(LogLevel.WARN);
       logger.warn('warn message 2');
-      expect(consoleSpy.warn).toHaveBeenCalledWith('WARN  [Test]', 'warn message 2');
+      // Note: warn uses console.log in Node.js implementation
+      expect(consoleSpy.log).toHaveBeenCalledWith('WARN  [Test]', 'warn message 2');
     });
 
     it('should log info when level is INFO or higher', () => {
diff --git a/apps/server/tests/unit/services/feature-loader.test.ts b/apps/server/tests/unit/services/feature-loader.test.ts
index a86bf0e5..dc540982 100644
--- a/apps/server/tests/unit/services/feature-loader.test.ts
+++ b/apps/server/tests/unit/services/feature-loader.test.ts
@@ -122,7 +122,7 @@ describe('feature-loader.ts', () => {
         { name: 'feature-2', isDirectory: () => true } as any,
       ]);
 
-      const consoleSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
+      const consoleSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
 
       vi.mocked(fs.readFile)
         .mockResolvedValueOnce(
@@ -183,7 +183,7 @@ describe('feature-loader.ts', () => {
         { name: 'feature-1', isDirectory: () => true } as any,
       ]);
 
-      const consoleSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
+      const consoleSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
 
       vi.mocked(fs.readFile).mockResolvedValue('invalid json{');
 
diff --git a/libs/utils/tests/logger.test.ts b/libs/utils/tests/logger.test.ts
index f058786b..861555b5 100644
--- a/libs/utils/tests/logger.test.ts
+++ b/libs/utils/tests/logger.test.ts
@@ -1,5 +1,5 @@
 import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
-import { createLogger, LogLevel, getLogLevel, setLogLevel } from '../src/logger';
+import { createLogger, LogLevel, getLogLevel, setLogLevel, setColorsEnabled } from '../src/logger';
 
 describe('logger.ts', () => {
   let originalConsoleError: typeof console.error;
@@ -14,6 +14,9 @@ describe('logger.ts', () => {
     originalConsoleLog = console.log;
     originalLogLevel = getLogLevel();
 
+    // Disable colors for predictable test output
+    setColorsEnabled(false);
+
     // Mock console methods
     console.error = vi.fn();
     console.warn = vi.fn();
@@ -73,8 +76,8 @@ describe('logger.ts', () => {
       logger.debug('debug message');
 
       expect(console.error).toHaveBeenCalledTimes(1);
-      expect(console.warn).toHaveBeenCalledTimes(1);
-      expect(console.log).not.toHaveBeenCalled();
+      // Note: warn uses console.log in Node.js implementation
+      expect(console.log).toHaveBeenCalledTimes(1);
     });
 
     it('should log error, warn, and info at INFO level', () => {
@@ -87,8 +90,8 @@ describe('logger.ts', () => {
       logger.debug('debug message');
 
       expect(console.error).toHaveBeenCalledTimes(1);
-      expect(console.warn).toHaveBeenCalledTimes(1);
-      expect(console.log).toHaveBeenCalledTimes(1); // Only info, not debug
+      // Note: warn and info both use console.log in Node.js implementation
+      expect(console.log).toHaveBeenCalledTimes(2); // warn + info, not debug
     });
 
     it('should log all messages at DEBUG level', () => {
@@ -101,8 +104,8 @@ describe('logger.ts', () => {
       logger.debug('debug message');
 
       expect(console.error).toHaveBeenCalledTimes(1);
-      expect(console.warn).toHaveBeenCalledTimes(1);
-      expect(console.log).toHaveBeenCalledTimes(2); // info + debug
+      // Note: warn, info, debug all use console.log in Node.js implementation
+      expect(console.log).toHaveBeenCalledTimes(3); // warn + info + debug
     });
   });
 
@@ -129,13 +132,14 @@ describe('logger.ts', () => {
   });
 
   describe('warn method', () => {
-    it('should use console.warn', () => {
+    it('should use console.log with WARN prefix', () => {
       const logger = createLogger('WarnTest');
       setLogLevel(LogLevel.WARN);
 
       logger.warn('warning message');
 
-      expect(console.warn).toHaveBeenCalledWith('WARN  [WarnTest]', 'warning message');
+      // Note: warn uses console.log in Node.js implementation
+      expect(console.log).toHaveBeenCalledWith('WARN  [WarnTest]', 'warning message');
     });
 
     it('should not log when level is below WARN', () => {
@@ -144,7 +148,7 @@ describe('logger.ts', () => {
 
       logger.warn('should not appear');
 
-      expect(console.warn).not.toHaveBeenCalled();
+      expect(console.log).not.toHaveBeenCalled();
     });
   });