diff --git a/test/parallel/test-assert-checktag.js b/test/parallel/test-assert-checktag.js
index 38ebaa1a143..70a67e15d3f 100644
--- a/test/parallel/test-assert-checktag.js
+++ b/test/parallel/test-assert-checktag.js
@@ -2,6 +2,12 @@
 require('../common');
 const assert = require('assert');
 
+// Disable colored output to prevent color codes from breaking assertion
+// message comparisons. This should only be an issue when process.stdout
+// is a TTY.
+if (process.stdout.isTTY)
+  process.env.NODE_DISABLE_COLORS = '1';
+
 // Turn off no-restricted-properties because we are testing deepEqual!
 /* eslint-disable no-restricted-properties */