diff --git a/testsuite/expect/globals b/testsuite/expect/globals
index c48da4684d176efbf38b80f2fb1b903958d3186d..3d70e8602b4f862b7cb1b278c5fc8495e9fef565 100755
--- a/testsuite/expect/globals
+++ b/testsuite/expect/globals
@@ -180,7 +180,7 @@ cset enable_memory_leak_debug 0
 # test_prompt: to be used as prompt for interactive shells
 set test_prompt  "TEST_PROMPT: "
 # reset_bash_prompt: to be used as command on scripts or interactive jobs
-set reset_bash_prompt "unset PROMPT_COMMAND; export PS1=\"$test_prompt\""
+set reset_bash_prompt "unset PROMPT_COMMAND; unset PS0; export PS1=\"$test_prompt\""
 
 #
 # Specify locations of other executable files used