diff --git a/scripts/self_test.py b/scripts/self_test.py
index fcc32b68ef5ad7e01e3a90626d301df29646afbf..418f19b27dec31f7f29172e4f05152bb0b52651f 100755
--- a/scripts/self_test.py
+++ b/scripts/self_test.py
@@ -1002,6 +1002,8 @@ class SelfTest(IvasScriptsCommon.IvasScript):
                 suffix = "nws"
             elif proc_cmd[0] == "eid-xor":
                 suffix = "fer"
+            else:
+                suffix = ""
 
             proc_cmd[0] = os.path.join(TOOLS_DIR, proc_cmd[0])