diff --git a/lib/pact_broker/pacts/content.rb b/lib/pact_broker/pacts/content.rb
index a82dc272e..8b42a46f7 100644
--- a/lib/pact_broker/pacts/content.rb
+++ b/lib/pact_broker/pacts/content.rb
@@ -38,10 +38,17 @@ def interactions_missing_test_results
         end
       end
 
+
       def with_test_results(test_results)
-        tests = test_results && test_results['tests']
-        if tests.nil? || !tests.is_a?(Array) || tests.empty?
-          tests = []
+        # new format
+        if test_results.is_a?(Array)
+          tests = test_results
+        else
+          # old format
+          tests = test_results && test_results['tests']
+          if tests.nil? || !tests.is_a?(Array) || tests.empty?
+            tests = []
+          end
         end
 
         new_pact_hash = pact_hash.dup
@@ -130,7 +137,15 @@ def merge_verification_results(interactions, tests)
       end
 
       def test_is_for_interaction(interaction, test)
-        test.is_a?(Hash) && interaction.is_a?(Hash) && test['interactionDescription'] == interaction['description'] && test['interactionProviderState'] == interaction['providerState']
+        test.is_a?(Hash) && interaction.is_a?(Hash) && ( interaction_ids_match(interaction, test) || description_and_state_match(interaction, test))
+      end
+
+      def interaction_ids_match(interaction, test)
+        interaction['_id'] && interaction['_id'] == test['interactionId']
+      end
+
+      def description_and_state_match(interaction, test)
+        test['interactionDescription'] && test['interactionDescription'] == interaction['description'] && test['interactionProviderState'] == interaction['providerState']
       end
     end
   end
diff --git a/spec/lib/pact_broker/pacts/content_spec.rb b/spec/lib/pact_broker/pacts/content_spec.rb
index 051f2a6ab..50d9748d6 100644
--- a/spec/lib/pact_broker/pacts/content_spec.rb
+++ b/spec/lib/pact_broker/pacts/content_spec.rb
@@ -359,6 +359,53 @@ module Pacts
             expect(subject.to_hash).to eq merged_with_empty_tests
           end
         end
+
+        context "with the new format" do
+          let(:test_results) do
+            [
+              {
+                "interactionId" => "1",
+                "success "=> false
+              },{
+                "foo" => "bar"
+              }
+            ]
+          end
+
+          let(:pact_content) do
+            {
+              "interactions" => [
+                {
+                 "_id" => "1"
+                },
+                {
+                 "_id" => "2"
+                }
+              ]
+            }
+          end
+
+          let(:merged) do
+            {
+              "interactions" => [
+                {
+                 "_id" => "1",
+                 "tests" => [{
+                    "interactionId" => "1",
+                    "success "=> false
+                  }]
+                },{
+                 "_id" => "2",
+                 "tests" => []
+                }
+              ]
+            }
+          end
+
+          it "merges the tests into the pact content" do
+            expect(subject.to_hash).to eq merged
+          end
+        end
       end
     end
   end