diff --git a/mayan/apps/lock_manager/tests/test_backends.py b/mayan/apps/lock_manager/tests/test_backends.py
index bb556e3e19..56efaec516 100644
--- a/mayan/apps/lock_manager/tests/test_backends.py
+++ b/mayan/apps/lock_manager/tests/test_backends.py
@@ -7,6 +7,8 @@ from django.utils.module_loading import import_string
 
 from ..exceptions import LockError
 
+TEST_LOCK_1 = 'test lock 1'
+
 
 class FileLockTestCase(TestCase):
     backend_string = 'lock_manager.backends.file_lock.FileLock'
@@ -15,42 +17,42 @@ class FileLockTestCase(TestCase):
         self.locking_backend = import_string(self.backend_string)
 
     def test_exclusive(self):
-        lock_1 = self.locking_backend.acquire_lock(name='test_lock_1')
+        lock_1 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
         with self.assertRaises(LockError):
-            self.locking_backend.acquire_lock(name='test_lock_1')
+            self.locking_backend.acquire_lock(name=TEST_LOCK_1)
 
         # Cleanup
         lock_1.release()
 
     def test_release(self):
-        lock_1 = self.locking_backend.acquire_lock(name='test_lock_1')
+        lock_1 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
         lock_1.release()
-        lock_2 = self.locking_backend.acquire_lock(name='test_lock_1')
+        lock_2 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
 
         # Cleanup
         lock_2.release()
 
     def test_timeout_expired(self):
-        self.locking_backend.acquire_lock(name='test_lock_1', timeout=1)
+        self.locking_backend.acquire_lock(name=TEST_LOCK_1, timeout=1)
 
         # lock_1 not release and not expired, should raise LockError
         with self.assertRaises(LockError):
-            self.locking_backend.acquire_lock(name='test_lock_1')
+            self.locking_backend.acquire_lock(name=TEST_LOCK_1)
 
-        time.sleep(2)
+        time.sleep(1.01)
         # lock_1 not release but has expired, should not raise LockError
-        lock_2 = self.locking_backend.acquire_lock(name='test_lock_1')
+        lock_2 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
 
         # Cleanup
         lock_2.release()
 
     def test_double_release(self):
-        lock_1 = self.locking_backend.acquire_lock(name='test_lock_1')
+        lock_1 = self.locking_backend.acquire_lock(name=TEST_LOCK_1)
         lock_1.release()
 
     def test_release_expired(self):
-        lock_1 = self.locking_backend.acquire_lock(name='test_lock_1', timeout=1)
-        time.sleep(2)
+        lock_1 = self.locking_backend.acquire_lock(name=TEST_LOCK_1, timeout=1)
+        time.sleep(1.01)
         lock_1.release()
         # No exception is raised even though the lock has expired.
         # The logic is that checking for expired locks during release is
@@ -58,8 +60,11 @@ class FileLockTestCase(TestCase):
         # would be successfull, even after an extended lapse of time
 
     def test_release_expired_reaquired(self):
-        time.sleep(2)
-        lock_2 = self.locking_backend.acquire_lock(name='test_lock_1', timeout=1)
+        lock_1 = self.locking_backend.acquire_lock(name=TEST_LOCK_1, timeout=1)
+        time.sleep(1.01)
+        # TEST_LOCK_1 is expired so trying to acquire it should not return an
+        # error.
+        lock_2 = self.locking_backend.acquire_lock(name=TEST_LOCK_1, timeout=1)
 
         # Cleanup
         lock_2.release()