diff --git a/lib/fog/aws/requests/sts/get_federation_token.rb b/lib/fog/aws/requests/sts/get_federation_token.rb
index 05d1a6748..2a8ce0e3f 100644
--- a/lib/fog/aws/requests/sts/get_federation_token.rb
+++ b/lib/fog/aws/requests/sts/get_federation_token.rb
@@ -41,6 +41,23 @@ module Fog
           })
         end
       end
+      class Mock
+        def get_federation_token(name, policy, duration=43200)
+          Excon::Response.new.tap do |response|
+            response.status = 200
+            response.body = {
+            'SessionToken'     => Fog::Mock.random_base64(580),
+            'SecretAccessKey'  => Fog::Mock.random_base64(40),
+            'Expiration'       => (DateTime.now + duration).strftime('%FT%TZ'),
+            'AccessKeyId'      => Fog::AWS::Mock.key_id(20),
+            'Arn'              => "arn:aws:sts::#{Fog::AWS::Mock.owner_id}:federated-user/#{name}",
+            'FederatedUserId'  => "#{Fog::AWS::Mock.owner_id}:#{name}",
+            'PackedPolicySize' => Fog::Mock.random_numbers(2),
+            'RequestId'        => Fog::AWS::Mock.request_id
+            }
+          end
+        end
+      end
     end
   end
 end
diff --git a/tests/aws/requests/sts/get_federation_token_tests.rb b/tests/aws/requests/sts/get_federation_token_tests.rb
index 758f2ab9e..469569aa3 100644
--- a/tests/aws/requests/sts/get_federation_token_tests.rb
+++ b/tests/aws/requests/sts/get_federation_token_tests.rb
@@ -14,7 +14,6 @@ Shindo.tests('AWS::STS | session tokens', ['aws']) do
 	}
 
 	tests("#get_federation_token('test@fog.io', #{@policy.inspect})").formats(@federation_format) do
-		pending if Fog.mocking?
 		Fog::AWS[:sts].get_federation_token("test@fog.io", @policy).body
 	end