diff --git a/test/cmd/setexpr.c b/test/cmd/setexpr.c
index 93b0c4b68f5..4e3a2f7aaa4 100644
--- a/test/cmd/setexpr.c
+++ b/test/cmd/setexpr.c
@@ -360,6 +360,7 @@ static int setexpr_test_str_long(struct unit_test_state *uts)
 	ut_asserteq(64 << 10, strlen(val));
 
 	unmap_sysmem(buf);
+	env_set("fred", NULL);
 
 	return 0;
 }