diff --git a/TESTS_ENVIRONMENT.in b/TESTS_ENVIRONMENT.in
index 775c59a6..42de4972 100644
--- a/TESTS_ENVIRONMENT.in
+++ b/TESTS_ENVIRONMENT.in
@@ -1,5 +1,7 @@
 #! /bin/bash
 
+unset NO_COLOR
+
 top_srcdir="@abssrcdir@"
 export top_srcdir