diff --git a/zsh.spec b/zsh.spec
index c03537f..61f7942 100644
--- a/zsh.spec
+++ b/zsh.spec
@@ -93,7 +93,10 @@ make -C Src -f Makemod zsh{path,xmod}s.h version.h
 %make_build all html
 
 %check
-# Run the testsuite
+# avoid unnecessary failure of the test-suite in case ${RPS1} is set
+unset RPS1
+
+# run the test-suite
 make check
 
 %install