diff --git a/src/pact-web.spec.ts b/src/pact-web.spec.ts
index 9f51361fc..76e523142 100644
--- a/src/pact-web.spec.ts
+++ b/src/pact-web.spec.ts
@@ -4,7 +4,7 @@ import * as chaiAsPromised from "chai-as-promised"
 import * as sinon from "sinon"
 import * as sinonChai from "sinon-chai"
 import { HTTPMethod } from "./common/request"
-import { InteractionObject } from "./dsl/interaction"
+import { Interaction, InteractionObject } from "./dsl/interaction"
 import { MockService } from "./dsl/mockService"
 import { PactOptionsComplete } from "./dsl/options"
 import { PactWeb } from "./pact-web"
@@ -98,6 +98,34 @@ describe("PactWeb", () => {
           .to.eventually.not.have.property("providerState")
           .notify(done)
       })
+
+      describe("when given an Interaction as a builder", () => {
+        it("creates interaction", () => {
+          const interaction2 = new Interaction()
+            .given("i have a list of projects")
+            .uponReceiving("a request for projects")
+            .withRequest({
+              method: HTTPMethod.GET,
+              path: "/projects",
+              headers: { Accept: "application/json" },
+            })
+            .willRespondWith({
+              status: 200,
+              headers: { "Content-Type": "application/json" },
+              body: {},
+            })
+
+          const pact = (Object.create(PactWeb.prototype) as any) as PactWeb
+          pact.opts = fullOpts
+          pact.mockService = ({
+            addInteraction: (int: Interaction): Promise<Interaction> =>
+              Promise.resolve(int),
+          } as any) as MockService
+          return expect(
+            pact.addInteraction(interaction2)
+          ).to.eventually.have.property("given")
+        })
+      })
     })
   })
 
diff --git a/src/pact-web.ts b/src/pact-web.ts
index 27a779d7b..772b88b02 100644
--- a/src/pact-web.ts
+++ b/src/pact-web.ts
@@ -63,9 +63,12 @@ export class PactWeb {
    * @param {Interaction} interactionObj
    * @returns {Promise}
    */
-  public addInteraction(interactionObj: InteractionObject): Promise<string> {
-    const interaction = new Interaction()
+  public addInteraction(interactionObj: InteractionObject | Interaction): Promise<string> {
+    if (interactionObj instanceof Interaction) {
+      return this.mockService.addInteraction(interactionObj)
+    }
 
+    const interaction = new Interaction()
     if (interactionObj.state) {
       interaction.given(interactionObj.state)
     }