diff --git a/test/subset/run-tests.py b/test/subset/run-tests.py
index fb4684cf1..0a1bb1076 100755
--- a/test/subset/run-tests.py
+++ b/test/subset/run-tests.py
@@ -32,11 +32,11 @@ def which(program):
 
 	return None
 
-ttx = which ("ttx")
+fonttools = which ("fonttools")
 ots_sanitize = which ("ots-sanitize")
 
-if not ttx:
-	print("TTX is not present, skipping test.")
+if not fonttools:
+	print("fonttools is not present, skipping test.")
 	sys.exit (77)
 
 def cmd(command):
@@ -101,8 +101,8 @@ def run_test(test, should_check_ots):
 	return 0
 
 def run_ttx (file):
-	print ("ttx %s" % file)
-	return cmd([ttx, "-q", "-o-", file])
+	print ("fonttools ttx %s" % file)
+	return cmd([fonttools, "ttx", "-q", "-o-", file])
 
 def strip_check_sum (ttx_string):
 	return re.sub ('checkSumAdjustment value=["]0x([0-9a-fA-F])+["]',