diff --git a/tests/__init__.py b/tests/__init__.py
index b912bed..b833a91 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -14,6 +14,18 @@ def failing_job(x):
     return x / 0
 
 
+def find_empty_redis_database():
+    """Tries to connect to a random Redis database (starting from 4), and
+    will use/connect it when no keys are in there.
+    """
+    for dbnum in range(4, 17):
+        testconn = Redis(db=dbnum)
+        empty = len(testconn.keys('*')) == 0
+        if empty:
+            return testconn
+    assert False, 'No empty Redis database found to run tests in.'
+
+
 class RQTestCase(unittest.TestCase):
     """Base class to inherit test cases from for RQ.
 
@@ -27,7 +39,7 @@ class RQTestCase(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         # Set up connection to Redis
-        testconn = Redis()
+        testconn = find_empty_redis_database()
         conn.push(testconn)
 
         # Store the connection (for sanity checking)