diff --git a/tests/test_asyncio/test_lock.py b/tests/test_asyncio/test_lock.py
index 264eeb47..d2d9e130 100644
--- a/tests/test_asyncio/test_lock.py
+++ b/tests/test_asyncio/test_lock.py
@@ -107,7 +107,7 @@ async def test_blocking(self, r):
     async def test_blocking_timeout(self, r):
         lock1 = self.get_lock(r, "foo")
         assert await lock1.acquire(blocking=False)
-        bt = 0.2
+        bt = 0.9
         sleep = 0.05
         lock2 = self.get_lock(r, "foo", sleep=sleep, blocking_timeout=bt)
         start = asyncio.get_running_loop().time()
diff --git a/tests/test_lock.py b/tests/test_lock.py
index bae5e663..329f127e 100644
--- a/tests/test_lock.py
+++ b/tests/test_lock.py
@@ -101,7 +101,7 @@ def test_blocking_timeout(self, r):
         assert lock1.acquire(blocking=False)
         bt = 0.4
         sleep = 0.05
-        fudge_factor = 0.1
+        fudge_factor = 0.5
         lock2 = self.get_lock(r, "foo", sleep=sleep, blocking_timeout=bt)
         start = time.monotonic()
         assert not lock2.acquire()
@@ -120,7 +120,7 @@ def test_context_manager_blocking_timeout(self, r):
         with self.get_lock(r, "foo", blocking=False):
             bt = 0.4
             sleep = 0.05
-            fudge_factor = 0.05
+            fudge_factor = 0.5
             lock2 = self.get_lock(r, "foo", sleep=sleep, blocking_timeout=bt)
             start = time.monotonic()
             assert not lock2.acquire()