diff --git a/‎tests/test_security_ref_links.py‎
Lines changed: 8 additions & 2 deletions b/‎tests/test_security_ref_links.py‎
Lines changed: 8 additions & 2 deletions
@@ -1,15 +1,21 @@
+import platform
 import time
 from unittest import TestCase
 
 from mistune import create_markdown
 
+IS_PYPY = platform.python_implementation() == "PyPy"
+
 
 class TestRefLinkSecurity(TestCase):
     def test_many_reference_links_return_quickly(self):
-        text = "".join("[a{}]: u\n".format(i) for i in range(3000))
+        repetitions = 500 if IS_PYPY else 3000
+        deadline = 1.0 if IS_PYPY else 0.5
+
+        text = "".join("[a{}]: u\n".format(i) for i in range(repetitions))
 
         start = time.monotonic()
         create_markdown()(text)
         elapsed = time.monotonic() - start
 
-        self.assertLess(elapsed, 0.5)
+        self.assertLess(elapsed, deadline)