diff --git a/src/console-logger.ts b/src/console-logger.ts
index 6fe8dc2..6ff2cd5 100644
--- a/src/console-logger.ts
+++ b/src/console-logger.ts
@@ -1,11 +1,11 @@
 import { Logger } from './logger';
 
 const consoleLogger$log = (log: (...args: unknown[]) => void) => (...args: unknown[]) => {
-    if (!args.length) {
-      log();
-    } else {
+    if (args.length && typeof args[0] === 'string') {
       // Avoid formatting.
-      log('%O', ...args);
+      log('%s', ...args);
+    } else {
+      log(...args);
     }
   };
 
diff --git a/src/console.logger.spec.ts b/src/console.logger.spec.ts
index 3ca146e..50e2562 100644
--- a/src/console.logger.spec.ts
+++ b/src/console.logger.spec.ts
@@ -16,9 +16,20 @@ describe('consoleLogger', () => {
       logSpy = jest.spyOn(console, 'error').mockImplementation(() => { /* do not log */ });
     });
 
-    it('logs to console', () => {
+    it('logs message to console', () => {
       consoleLogger.error('message', 1, 2, 3);
-      expect(logSpy).toHaveBeenCalledWith('%O', 'message', 1, 2, 3);
+      expect(logSpy).toHaveBeenCalledWith('%s', 'message', 1, 2, 3);
+    });
+    it('logs object to console', () => {
+
+      const object = { name: 'test' };
+
+      consoleLogger.error(object, 1, 2, 3);
+      expect(logSpy).toHaveBeenCalledWith(object, 1, 2, 3);
+    });
+    it('logs `undefined` to console', () => {
+      consoleLogger.error(undefined);
+      expect(logSpy).toHaveBeenCalledWith(undefined);
     });
     it('logs empty message to console', () => {
       consoleLogger.error();
@@ -32,9 +43,20 @@ describe('consoleLogger', () => {
       logSpy = jest.spyOn(console, 'warn').mockImplementation(() => { /* do not log */ });
     });
 
-    it('logs to console', () => {
+    it('logs message to console', () => {
       consoleLogger.warn('message', 1, 2, 3);
-      expect(logSpy).toHaveBeenCalledWith('%O', 'message', 1, 2, 3);
+      expect(logSpy).toHaveBeenCalledWith('%s', 'message', 1, 2, 3);
+    });
+    it('logs object to console', () => {
+
+      const object = { name: 'test' };
+
+      consoleLogger.warn(object, 1, 2, 3);
+      expect(logSpy).toHaveBeenCalledWith(object, 1, 2, 3);
+    });
+    it('logs `undefined` to console', () => {
+      consoleLogger.warn(undefined);
+      expect(logSpy).toHaveBeenCalledWith(undefined);
     });
     it('logs empty message to console', () => {
       consoleLogger.warn();
@@ -48,9 +70,20 @@ describe('consoleLogger', () => {
       logSpy = jest.spyOn(console, 'info').mockImplementation(() => { /* do not log */ });
     });
 
-    it('logs to console', () => {
+    it('logs message to console', () => {
       consoleLogger.info('message', 1, 2, 3);
-      expect(logSpy).toHaveBeenCalledWith('%O', 'message', 1, 2, 3);
+      expect(logSpy).toHaveBeenCalledWith('%s', 'message', 1, 2, 3);
+    });
+    it('logs object to console', () => {
+
+      const object = { name: 'test' };
+
+      consoleLogger.info(object, 1, 2, 3);
+      expect(logSpy).toHaveBeenCalledWith(object, 1, 2, 3);
+    });
+    it('logs `undefined` to console', () => {
+      consoleLogger.info(undefined);
+      expect(logSpy).toHaveBeenCalledWith(undefined);
     });
     it('logs empty message to console', () => {
       consoleLogger.info();
@@ -64,9 +97,20 @@ describe('consoleLogger', () => {
       logSpy = jest.spyOn(console, 'debug').mockImplementation(() => { /* do not log */ });
     });
 
-    it('logs to console', () => {
+    it('logs message to console', () => {
       consoleLogger.debug('message', 1, 2, 3);
-      expect(logSpy).toHaveBeenCalledWith('%O', 'message', 1, 2, 3);
+      expect(logSpy).toHaveBeenCalledWith('%s', 'message', 1, 2, 3);
+    });
+    it('logs object to console', () => {
+
+      const object = { name: 'test' };
+
+      consoleLogger.debug(object, 1, 2, 3);
+      expect(logSpy).toHaveBeenCalledWith(object, 1, 2, 3);
+    });
+    it('logs `undefined` to console', () => {
+      consoleLogger.debug(undefined);
+      expect(logSpy).toHaveBeenCalledWith(undefined);
     });
     it('logs empty message to console', () => {
       consoleLogger.debug();