diff --git a/uglify-js.spec b/uglify-js.spec
index 3415622..aa52958 100644
--- a/uglify-js.spec
+++ b/uglify-js.spec
@@ -97,7 +97,7 @@ ln -sf uglify-js@2 %{buildroot}%{nodejs_sitelib}/uglify-js
 sed -i '/timeout/ s/5000/10000/' test/mocha/cli.js
 sed -i '/timeout/ s/10000/20000/' test/mocha/let.js
 sed -i '/timeout/ s/20000/40000/' test/mocha/spidermonkey.js
-%__nodejs test/run-tests.js
+NODE_DISABLE_COLORS=true %{__nodejs} test/run-tests.js
 %endif
 
 
@@ -132,6 +132,7 @@ end
 %changelog
 * Wed Jan 22 2020 Jan Staněk <jstanek@redhat.com> - 2.8.22-8
 - Remove unneeded legacy conditionals around %%{nodejs_arches} and %%{_jsdir}
+- Disable colors in tests
 
 * Sat Jul 27 2019 Fedora Release Engineering <releng@fedoraproject.org> - 2.8.22-7
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild