diff --git a/tests/scripts/test_psa_constant_names.py b/tests/scripts/test_psa_constant_names.py
index 53af0a5..e640408 100755
--- a/tests/scripts/test_psa_constant_names.py
+++ b/tests/scripts/test_psa_constant_names.py
@@ -269,8 +269,10 @@
     except OSError:
         pass
 
-def run_c(options, type_word, expressions):
+def run_c(type_word, expressions, include_path=None, keep_c=False):
     """Generate and run a program to print out numerical values for expressions."""
+    if include_path is None:
+        include_path = []
     if type_word == 'status':
         cast_to = 'long'
         printf_format = '%ld'
@@ -304,9 +306,9 @@
         c_file.close()
         cc = os.getenv('CC', 'cc')
         subprocess.check_call([cc] +
-                              ['-I' + dir for dir in options.include] +
+                              ['-I' + dir for dir in include_path] +
                               ['-o', exe_name, c_name])
-        if options.keep_c:
+        if keep_c:
             sys.stderr.write('List of {} tests kept at {}\n'
                              .format(type_word, c_name))
         else:
@@ -324,7 +326,7 @@
     """
     return re.sub(NORMALIZE_STRIP_RE, '', expr)
 
-def collect_values(options, inputs, type_word):
+def collect_values(inputs, type_word, include_path=None, keep_c=False):
     """Generate expressions using known macro names and calculate their values.
 
     Return a list of pairs of (expr, value) where expr is an expression and
@@ -332,7 +334,8 @@
     """
     names = inputs.get_names(type_word)
     expressions = sorted(inputs.generate_expressions(names))
-    values = run_c(options, type_word, expressions)
+    values = run_c(type_word, expressions,
+                   include_path=include_path, keep_c=keep_c)
     return expressions, values
 
 def do_test(options, inputs, type_word):
@@ -346,7 +349,9 @@
     that have been tested and ``errors`` is the list of errors that were
     encountered.
     """
-    expressions, values = collect_values(options, inputs, type_word)
+    expressions, values = collect_values(inputs, type_word,
+                                         include_path=options.include,
+                                         keep_c=options.keep_c)
     output = subprocess.check_output([options.program, type_word] + values)
     outputs = output.decode('ascii').strip().split('\n')
     errors = [(type_word, expr, value, output)