diff --git a/scripts/self_test.py b/scripts/self_test.py
index 7688fc50f9427655b17ddb67f35cf652a8c42474..be1fb74adc7a2be66a7a0f77d44aa8c6dd08fd33 100755
--- a/scripts/self_test.py
+++ b/scripts/self_test.py
@@ -63,7 +63,7 @@ MODES = {
         "5_1_4": "5_1_4",
         "7_1_4": "7_1_4",
     },
-    "-ISM": {"1": "ISM1", "2": "ISM2", "3": "ISM3", "4": "ISM4", "+4": "ISM+4"},
+    "-ISM": {"1": "ISM1", "2": "ISM2", "3": "ISM3", "4": "ISM4", "+1": "ISM+1", "+2": "ISM+2", "+3": "ISM+3", "+4": "ISM+4"},
     "-SBA": {
         "-3": "HOA3",
         "3": "HOA3",
@@ -896,7 +896,7 @@ class SelfTest(IvasScriptsCommon.IvasScript):
             return test_f
         else:
             return arg_par
-
+            
     def create_mode_dict_entry(self, mode_dict, mode):
         # print(mode)
         entry_dict = {  # operating point key
@@ -921,7 +921,6 @@ class SelfTest(IvasScriptsCommon.IvasScript):
         }  # needed for correct working of the IvasModeAnalyzer
 
         # get encoder and mode:
-
         enc_cmd = mode[1].pop(0).split()
         # print(enc_cmd)
         encoder_bin = enc_cmd.pop(0)