diff --git a/scripts/generate_test_code.py b/scripts/generate_test_code.py
index 1cc18ad37..2ac00add2 100755
--- a/scripts/generate_test_code.py
+++ b/scripts/generate_test_code.py
@@ -206,7 +206,7 @@ CONDITION_OPERATOR_REGEX = r'[!=]=|[<>]=?'
 #       - math operators, i.e "+", "-", "*", "/"
 #       - bitwise operators, i.e. "^", "|", "&", "~", "<<", ">>"
 #       - parentheses, i.e. "()"
-CONDITION_VALUE_REGEX = r'[\d|\w|\(][\s_\(\)0-9a-zA-Z\+\-\*\/\^\|\&\~\<\>]*'
+CONDITION_VALUE_REGEX = r'[\w|\(][\s\w\(\)\+\-\*\/\^\|\&\~\<\>]*'
 CONDITION_REGEX = r'({})(?:\s*({})\s*({}))?$'.format(C_IDENTIFIER_REGEX,
                                                      CONDITION_OPERATOR_REGEX,
                                                      CONDITION_VALUE_REGEX)