diff --git a/test/rule-syntax-check.py b/test/rule-syntax-check.py
index 8b26c988ab..658b9459a9 100755
--- a/test/rule-syntax-check.py
+++ b/test/rule-syntax-check.py
@@ -19,7 +19,7 @@ quoted_string_re = r'"(?:[^\\"]|\\.)*"'
 no_args_tests = re.compile(r'(ACTION|DEVPATH|KERNELS?|NAME|SYMLINK|SUBSYSTEMS?|DRIVERS?|TAG|PROGRAM|RESULT|TEST)\s*(?:=|!)=\s*' + quoted_string_re + '$')
 # PROGRAM can also be specified as an assignment.
 program_assign = re.compile(r'PROGRAM\s*=\s*' + quoted_string_re + '$')
-args_tests = re.compile(r'(ATTRS?|ENV|TEST){([a-zA-Z0-9/_.*%-]+)}\s*(?:=|!)=\s*' + quoted_string_re + '$')
+args_tests = re.compile(r'(ATTRS?|ENV|CONST|TEST){([a-zA-Z0-9/_.*%-]+)}\s*(?:=|!)=\s*' + quoted_string_re + '$')
 no_args_assign = re.compile(r'(NAME|SYMLINK|OWNER|GROUP|MODE|TAG|RUN|LABEL|GOTO|OPTIONS|IMPORT)\s*(?:\+=|:=|=)\s*' + quoted_string_re + '$')
 args_assign = re.compile(r'(ATTR|ENV|IMPORT|RUN){([a-zA-Z0-9/_.*%-]+)}\s*(=|\+=)\s*' + quoted_string_re + '$')
 # Find comma-separated groups, but allow commas that are inside quoted strings.