diff --git a/src/vs/base/test/common/stream.test.ts b/src/vs/base/test/common/stream.test.ts
index d936ad52bcc61e93135b5c59ab998163753ec169..a7dc6efe0f178b3d46a3040be9c7ca84a398df45 100644
--- a/src/vs/base/test/common/stream.test.ts
+++ b/src/vs/base/test/common/stream.test.ts
@@ -106,6 +106,8 @@ suite('Stream', () => {
 		error = false;
 		stream.removeListener('error', errorListener);
 
+		// always leave at least one error listener to streams to avoid unexpected errors during test running
+		stream.on('error', () => { });
 		stream.error(new Error());
 		assert.equal(error, false);
 	});