diff --git a/tests/test_elb/test_server.py b/tests/test_elb/test_server.py
index 04b12524e..0033284d7 100644
--- a/tests/test_elb/test_server.py
+++ b/tests/test_elb/test_server.py
@@ -12,6 +12,6 @@ def test_elb_describe_instances():
     backend = server.create_backend_app("elb")
     test_client = backend.test_client()
 
-    res = test_client.get('/?Action=DescribeLoadBalancers')
+    res = test_client.get('/?Action=DescribeLoadBalancers&Version=2015-12-01')
 
     res.data.should.contain(b'DescribeLoadBalancersResponse')
diff --git a/tests/test_elbv2/test_server.py b/tests/test_elbv2/test_server.py
index 5acad4051..ddd40a02d 100644
--- a/tests/test_elbv2/test_server.py
+++ b/tests/test_elbv2/test_server.py
@@ -12,6 +12,6 @@ def test_elbv2_describe_load_balancers():
     backend = server.create_backend_app("elbv2")
     test_client = backend.test_client()
 
-    res = test_client.get('/?Action=DescribeLoadBalancers')
+    res = test_client.get('/?Action=DescribeLoadBalancers&Version=2015-12-01')
 
     res.data.should.contain(b'DescribeLoadBalancersResponse')