Index: src/tests/test.py
===================================================================
--- src/tests/test.py	(revision e82aa9df9f1dc1335a759e00a2d82ca558fe6b0e)
+++ src/tests/test.py	(revision b1848a0d95cbc3cc0a9b494f8765c86ce58bafb6)
@@ -99,9 +99,4 @@
 		return False
 
-# find the test data for a given test name
-def filterTests(testname) :
-	found = [test for test in allTests if test.name == testname]
-	return (found[0] if len(found) == 1 else Test(testname, testname) )
-
 ################################################################################
 #               running test functions
@@ -141,5 +136,5 @@
 		if not dry_run and fileContainsOnly(out_file, "make: *** No rule to make target `%s'.  Stop." % test.name) :
 			retcode = 1;
-			error = "\t\tNo make target for test %s!" % test
+			error = "\t\tNo make target for test %s!" % test.name
 			sh("rm %s" % out_file, False)
 
@@ -252,5 +247,10 @@
 	# already existing tests and create new info for the new tests
 	if options.regenerate_expected :
-		tests = map(filterTests, options.tests)
+		for testname in options.tests :
+			if testname.endswith(".c") or testname.endswith(".cc") or testname.endswith(".cpp") :
+				print('ERROR: "%s", tests are not allowed to end with a C/C++/CFA extension, ignoring it' % testname, file=sys.stderr)
+			else :
+				found = [test for test in allTests if test.name == testname]
+				tests.append( found[0] if len(found) == 1 else Test(testname, testname) )
 
 	else :