diff --git a/test/client.ts b/test/client.ts
index 0d3b4d9684f..9818361df1b 100644
--- a/test/client.ts
+++ b/test/client.ts
@@ -881,7 +881,7 @@ describe('client', () => {
     });
   });
 
-  describe.only('forceFetch', () => {
+  describe('forceFetch', () => {
     const query = gql`
       query number {
         myNumber {
@@ -916,7 +916,7 @@ describe('client', () => {
 
     afterEach(() => {
       if (clock) {
-        clock.reset();
+        clock.restore();
       }
     });
 
diff --git a/test/mocks/mockNetworkInterface.ts b/test/mocks/mockNetworkInterface.ts
index 016aa0cba4c..d20ee9fbf86 100644
--- a/test/mocks/mockNetworkInterface.ts
+++ b/test/mocks/mockNetworkInterface.ts
@@ -65,12 +65,13 @@ export class MockNetworkInterface implements NetworkInterface {
       };
 
       const key = requestToKey(parsedRequest);
+      const responses = this.mockedResponsesByKey[key];
 
-      if (!this.mockedResponsesByKey[key]) {
+      if (!responses || responses.length === 0) {
         throw new Error('No more mocked responses for the query: ' + request.query);
       }
 
-      const { result, error, delay } = this.mockedResponsesByKey[key].shift();
+      const { result, error, delay } = responses.shift();
 
       if (!result && !error) {
         throw new Error(`Mocked response should contain either result or error: ${key}`);