diff --git a/src/__tests__/client.ts b/src/__tests__/client.ts
index 7f7c84fa2ef..dc637f3f8f7 100644
--- a/src/__tests__/client.ts
+++ b/src/__tests__/client.ts
@@ -187,7 +187,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query, variables },
       result: { data: result },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -251,7 +251,7 @@ describe('client', () => {
     }, {
       request: { query, variables: override },
       result: { data: overriddenResult },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -396,7 +396,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data },
-    }).setOnError(reject);
+    });
 
     const initialState: any = {
       data: {
@@ -454,7 +454,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data },
-    }).setOnError(reject);
+    });
 
     const initialState: any = {
       data: {
@@ -510,7 +510,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data },
-    }).setOnError(reject);
+    });
 
     const initialState: any = {
       data: {
@@ -569,7 +569,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { errors },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -732,7 +732,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -777,7 +777,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: {},
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -819,7 +819,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -875,7 +875,7 @@ describe('client', () => {
     }, {
       request: { query: transformedQuery },
       result: { data: transformedResult },
-    }, false).setOnError(reject);
+    }, false);
 
     const client = new ApolloClient({
       link,
@@ -924,7 +924,7 @@ describe('client', () => {
     }, {
       request: { query: transformedQuery },
       result: { data: transformedResult },
-    }, false).setOnError(reject);
+    }, false);
 
     const client = new ApolloClient({
       link,
@@ -967,7 +967,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query: mutation },
       result: { data: result },
-    }).setOnError(reject);
+    });
     const client = new ApolloClient({
       link,
       cache: new InMemoryCache({ addTypename: false }),
@@ -1003,7 +1003,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data: result },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -1049,7 +1049,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data: result },
-    }).setOnError(reject);
+    });
     const client = new ApolloClient({
       link,
       cache: new InMemoryCache({ addTypename: false }),
@@ -1085,7 +1085,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data: result },
-    }).setOnError(reject);
+    });
     const client = new ApolloClient({
       link,
       cache: new InMemoryCache({ addTypename: false }),
@@ -1131,7 +1131,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data: result },
-    }).setOnError(reject);
+    });
     const client = new ApolloClient({
       link,
       cache: new InMemoryCache({
@@ -1180,7 +1180,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { data: result },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -1243,7 +1243,7 @@ describe('client', () => {
     }, {
       request: { query: mutation },
       result: { data: mutationResult },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -1368,7 +1368,7 @@ describe('client', () => {
         request: { query: queryDoc },
         result: { data: data2 },
       },
-    ).setOnError(reject);
+    );
 
     const client = new ApolloClient({
       link,
@@ -1414,7 +1414,7 @@ describe('client', () => {
     }, {
       request: { query: queryDoc },
       result: { data: data2 },
-    }).setOnError(reject);
+    });
     const client = new ApolloClient({
       link,
       cache: new InMemoryCache({ addTypename: false }),
@@ -1626,7 +1626,7 @@ describe('client', () => {
       const link = mockSingleLink({
         request: { query },
         result: { data },
-      }).setOnError(reject);
+      });
 
       const client = new ApolloClient({
         link,
@@ -1720,7 +1720,7 @@ describe('client', () => {
       const link = mockSingleLink({
         request: { query },
         result: { data: networkFetch },
-      }).setOnError(reject);
+      });
 
       const client = new ApolloClient({
         link,
@@ -1748,7 +1748,7 @@ describe('client', () => {
       const link = mockSingleLink({
         request: { query },
         result: { data: networkFetch },
-      }).setOnError(reject);
+      });
       const client = new ApolloClient({
         link,
         cache: new InMemoryCache({ addTypename: false }),
@@ -1794,7 +1794,7 @@ describe('client', () => {
       const link = mockSingleLink({
         request: { query },
         result: { errors: [{ message: 'network failure' }] },
-      }).setOnError(reject);
+      });
 
       const client = new ApolloClient({
         link,
@@ -1843,7 +1843,7 @@ describe('client', () => {
       const link = mockSingleLink({
         request: { query },
         result: { data },
-      }).setOnError(reject);
+      });
 
       const client = new ApolloClient({ link, cache: new InMemoryCache() });
 
@@ -1884,7 +1884,7 @@ describe('client', () => {
       const link = mockSingleLink({
         request: { query },
         result: { data },
-      }).setOnError(reject);
+      });
 
       const client = new ApolloClient({ link, cache: new InMemoryCache() });
 
@@ -1936,7 +1936,7 @@ describe('client', () => {
       }, {
         request: { query },
         result: { data: secondFetch },
-      }).setOnError(reject);
+      });
     }
 
     itAsync('forces the query to rerun', (resolve, reject) => {
@@ -2066,7 +2066,7 @@ describe('client', () => {
       link: mockSingleLink({
         request: { query: mutation },
         result: { data, errors },
-      }).setOnError(reject),
+      }),
       cache: new InMemoryCache({ addTypename: false }),
     });
     client
@@ -2103,7 +2103,7 @@ describe('client', () => {
       link: mockSingleLink({
         request: { query: mutation },
         result: { data, errors },
-      }).setOnError(reject),
+      }),
       cache: new InMemoryCache({ addTypename: false }),
     });
     client
@@ -2142,7 +2142,7 @@ describe('client', () => {
       link: mockSingleLink({
         request: { query: mutation },
         result: { data, errors },
-      }).setOnError(reject),
+      }),
       cache: new InMemoryCache({ addTypename: false }),
     });
     client
@@ -2181,7 +2181,7 @@ describe('client', () => {
       link: mockSingleLink({
         request: { query: mutation },
         result: { data, errors },
-      }).setOnError(reject),
+      }),
       cache: new InMemoryCache({ addTypename: false }),
     });
     const mutatePromise = client.mutate({
@@ -2589,7 +2589,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result: { errors },
-    }).setOnError(reject);
+    });
     const client = new ApolloClient({
       link,
       cache: new InMemoryCache(),
@@ -2628,7 +2628,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query },
       result,
-    }).setOnError(reject);
+    });
     const client = new ApolloClient({
       link,
       cache: new InMemoryCache({
@@ -2677,7 +2677,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query: transformedQuery },
       result: { data: result },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -2719,7 +2719,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query: transformedQuery },
       result: { data: result },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -2771,7 +2771,7 @@ describe('client', () => {
     const link = mockSingleLink({
       request: { query: transformedQuery },
       result: { data: result },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -2815,7 +2815,7 @@ describe('@connection', () => {
     const link = mockSingleLink({
       request: { query: transformedQuery },
       result: { data: result },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -2860,7 +2860,7 @@ describe('@connection', () => {
     const link = mockSingleLink({
       request: { query: transformedQuery, variables },
       result: { data: result },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -2904,7 +2904,7 @@ describe('@connection', () => {
     const link = mockSingleLink({
       request: { query: transformedQuery, variables },
       result: { data: result },
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -3138,7 +3138,7 @@ describe('@connection', () => {
       const link = mockSingleLink({
         request: { query },
         result: { data: networkFetch },
-      }).setOnError(reject);
+      });
       const client = new ApolloClient({
         link,
         cache: new InMemoryCache({ addTypename: false }),
@@ -3267,7 +3267,7 @@ describe('@connection', () => {
       const link = mockSingleLink({
         request: { query },
         result: { errors },
-      }).setOnError(reject);
+      });
       const client = new ApolloClient({
         link,
         cache: new InMemoryCache({ addTypename: false }),
@@ -3297,7 +3297,7 @@ describe('@connection', () => {
       const link = mockSingleLink({
         request: { query: mutation, variables: { id: 1 } },
         result: { data },
-      }).setOnError(reject);
+      });
 
       const client = new ApolloClient({
         link,
@@ -3330,7 +3330,7 @@ function clientRoundtrip(
   const link = mockSingleLink({
     request: { query: cloneDeep(query) },
     result: data,
-  }).setOnError(reject);
+  });
 
   const client = new ApolloClient({
     link,
diff --git a/src/__tests__/fetchMore.ts b/src/__tests__/fetchMore.ts
index 7b7a5512387..255bbfbee60 100644
--- a/src/__tests__/fetchMore.ts
+++ b/src/__tests__/fetchMore.ts
@@ -31,7 +31,7 @@ describe('updateQuery on a simple query', () => {
     const link = mockSingleLink({
       request: { query },
       result,
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -97,7 +97,7 @@ describe('updateQuery on a query with required and optional variables', () => {
         variables,
       },
       result,
-    }).setOnError(reject);
+    });
 
     const client = new ApolloClient({
       link,
@@ -206,7 +206,7 @@ describe('fetchMore on an observable query', () => {
         variables,
       },
       result,
-    }, ...mockedResponses).setOnError(reject);
+    }, ...mockedResponses);
 
     const client = new ApolloClient({
       link,
@@ -241,7 +241,7 @@ describe('fetchMore on an observable query', () => {
           variables,
         },
         result,
-      }, ...mockedResponses).setOnError(reject),
+      }, ...mockedResponses),
       cache: new InMemoryCache(cacheConfig),
     });
 
@@ -509,7 +509,7 @@ describe('fetchMore on an observable query', () => {
             groceries: additionalGroceries,
           },
         },
-      }).setOnError(reject),
+      }),
     });
 
     const observable = client.watchQuery({
@@ -821,7 +821,7 @@ describe('fetchMore on an observable query with connection', () => {
         variables,
       },
       result,
-    }, ...mockedResponses).setOnError(reject);
+    }, ...mockedResponses);
 
     const client = new ApolloClient({
       link,
@@ -856,7 +856,7 @@ describe('fetchMore on an observable query with connection', () => {
           variables,
         },
         result,
-      }, ...mockedResponses).setOnError(reject),
+      }, ...mockedResponses),
       cache: new InMemoryCache(cacheConfig),
     });
 
@@ -952,7 +952,7 @@ describe('fetchMore on an observable query with connection', () => {
         request: { query: transformedQuery, variables: variablesMore },
         result: resultMore,
         delay: 5,
-      }).setOnError(reject);
+      });
 
       const client = new ApolloClient({
         link,
@@ -1011,7 +1011,7 @@ describe('fetchMore on an observable query with connection', () => {
         request: { query: transformedQuery, variables: variablesMore },
         result: resultMore,
         delay: 5,
-      }).setOnError(reject);
+      });
 
       const client = new ApolloClient({
         link,
diff --git a/src/__tests__/local-state/export.ts b/src/__tests__/local-state/export.ts
index 45eac6ace1f..62402441d6a 100644
--- a/src/__tests__/local-state/export.ts
+++ b/src/__tests__/local-state/export.ts
@@ -371,7 +371,7 @@ describe('@client @export tests', () => {
             reviewerDetails,
           },
         });
-      }).setOnError(reject);
+      });
 
       const cache = new InMemoryCache();
       const client = new ApolloClient({
diff --git a/src/__tests__/mutationResults.ts b/src/__tests__/mutationResults.ts
index 3da12270b34..f7484692a5c 100644
--- a/src/__tests__/mutationResults.ts
+++ b/src/__tests__/mutationResults.ts
@@ -156,7 +156,7 @@ describe('mutation results', () => {
         request: { query: queryWithTypename } as any,
         result,
         delay,
-      }, ...mockedResponses).setOnError(reject),
+      }, ...mockedResponses),
       cache: new InMemoryCache({
         dataIdFromObject: (obj: any) => {
           if (obj.id && obj.__typename) {
@@ -260,7 +260,7 @@ describe('mutation results', () => {
       result: {
         data: { mini: { id: 1, cover: 'image2', __typename: 'Mini' } },
       },
-    }).setOnError(reject);
+    });
 
     interface Data {
       mini: { id: number; cover: string; __typename: string };
@@ -332,7 +332,7 @@ describe('mutation results', () => {
           },
         });
         observer.complete();
-      })).setOnError(reject),
+      })),
     });
 
     const mutation = gql`
@@ -832,7 +832,7 @@ describe('mutation results', () => {
       }, {
         request: { query: resetMutation } as any,
         result: resetMutationResult,
-      }).setOnError(reject),
+      }),
       cache: new InMemoryCache({ addTypename: false }),
     });
 
@@ -1429,7 +1429,7 @@ describe('mutation results', () => {
           request: {query: mutation} as any,
           result: result1,
 
-        }).setOnError(reject),
+        }),
         cache: new InMemoryCache({addTypename: false}),
       });
 
diff --git a/src/__tests__/optimistic.ts b/src/__tests__/optimistic.ts
index 9dd5bc74978..29325b92ca2 100644
--- a/src/__tests__/optimistic.ts
+++ b/src/__tests__/optimistic.ts
@@ -1281,7 +1281,7 @@ describe('optimistic mutation results', () => {
         request: { query: mutation },
         result: mutationResult2,
         delay: 20,
-      }).setOnError(reject);
+      });
 
       const customOptimisticResponse1 = {
         __typename: 'Mutation',
@@ -1746,7 +1746,7 @@ describe('optimistic mutation results', () => {
         request: { query: mutation },
         result: mutationResult2,
         delay: 20,
-      }).setOnError(reject);
+      });
 
       const customOptimisticResponse1 = {
         __typename: 'Mutation',
@@ -2221,7 +2221,7 @@ describe('optimistic mutation - githunt comments', () => {
         variables,
       },
       result,
-    }, ...mockedResponses).setOnError(reject);
+    }, ...mockedResponses);
 
     const client = new ApolloClient({
       link,
diff --git a/src/__tests__/subscribeToMore.ts b/src/__tests__/subscribeToMore.ts
index 3c5b4959ac1..42ceda2ca49 100644
--- a/src/__tests__/subscribeToMore.ts
+++ b/src/__tests__/subscribeToMore.ts
@@ -63,7 +63,7 @@ describe('subscribeToMore', () => {
   itAsync('triggers new result from subscription data', (resolve, reject) => {
     let latestResult: any = null;
     const wSLink = mockObservableLink();
-    const httpLink = mockSingleLink(req1).setOnError(reject);
+    const httpLink = mockSingleLink(req1);
 
     const link = ApolloLink.split(isSub, wSLink, httpLink);
     let counter = 0;
@@ -115,7 +115,7 @@ describe('subscribeToMore', () => {
   itAsync('calls error callback on error', (resolve, reject) => {
     let latestResult: any = null;
     const wSLink = mockObservableLink();
-    const httpLink = mockSingleLink(req1).setOnError(reject);
+    const httpLink = mockSingleLink(req1);
 
     const link = ApolloLink.split(isSub, wSLink, httpLink);
 
@@ -173,7 +173,7 @@ describe('subscribeToMore', () => {
     let latestResult: any = null;
 
     const wSLink = mockObservableLink();
-    const httpLink = mockSingleLink(req1).setOnError(reject);
+    const httpLink = mockSingleLink(req1);
 
     const link = ApolloLink.split(isSub, wSLink, httpLink);
 
@@ -232,7 +232,7 @@ describe('subscribeToMore', () => {
   itAsync('should not corrupt the cache (#3062)', async (resolve, reject) => {
     let latestResult: any = null;
     const wSLink = mockObservableLink();
-    const httpLink = mockSingleLink(req4).setOnError(reject);
+    const httpLink = mockSingleLink(req4);
 
     const link = ApolloLink.split(isSub, wSLink, httpLink);
     let counter = 0;
@@ -343,7 +343,7 @@ describe('subscribeToMore', () => {
 
     let latestResult: any = null;
     const wSLink = mockObservableLink();
-    const httpLink = mockSingleLink(typedReq).setOnError(reject);
+    const httpLink = mockSingleLink(typedReq);
 
     const link = ApolloLink.split(isSub, wSLink, httpLink);
     let counter = 0;
diff --git a/src/cache/inmemory/__tests__/policies.ts b/src/cache/inmemory/__tests__/policies.ts
index dcf75babe1b..a86cac3e200 100644
--- a/src/cache/inmemory/__tests__/policies.ts
+++ b/src/cache/inmemory/__tests__/policies.ts
@@ -2580,7 +2580,7 @@ describe("type policies", function () {
             }
           },
         }
-      ]).setOnError(reject);
+      ]);
 
       const client = new ApolloClient({ link, cache });
 
@@ -3002,7 +3002,7 @@ describe("type policies", function () {
             },
           },
         },
-      ]).setOnError(reject);
+      ]);
 
       const client = new ApolloClient({ link, cache });
 
diff --git a/src/core/__tests__/ObservableQuery.ts b/src/core/__tests__/ObservableQuery.ts
index c220cb36895..baaecc6e8c0 100644
--- a/src/core/__tests__/ObservableQuery.ts
+++ b/src/core/__tests__/ObservableQuery.ts
@@ -1306,7 +1306,7 @@ describe('ObservableQuery', () => {
       }, {
         request: { query: queryWithFragment, variables },
         result: { data: dataTwoWithTypename },
-      }).setOnError(reject);
+      });
 
       const client = new ApolloClient({
         link: ni,
diff --git a/src/core/__tests__/QueryManager/index.ts b/src/core/__tests__/QueryManager/index.ts
index e29ba0e1a21..90072ff9769 100644
--- a/src/core/__tests__/QueryManager/index.ts
+++ b/src/core/__tests__/QueryManager/index.ts
@@ -125,7 +125,7 @@ describe('QueryManager', () => {
     const link = mockSingleLink({
       request: { query: mutation, variables },
       result: { data, errors },
-    }).setOnError(reject);
+    });
 
     const queryManager = createQueryManager({
       link,
@@ -1471,7 +1471,7 @@ describe('QueryManager', () => {
       link: mockSingleLink({
         request: { query: mutation },
         result: { data },
-      }).setOnError(reject),
+      }),
       config: { dataIdFromObject: getIdField },
     });
 
@@ -1682,7 +1682,7 @@ describe('QueryManager', () => {
       link: mockSingleLink({
         request: { query: transformedQuery },
         result: { data: transformedQueryResult },
-      }).setOnError(reject),
+      }),
       config: { addTypename: true },
     })
       .query({ query: query })
@@ -1723,7 +1723,7 @@ describe('QueryManager', () => {
       link: mockSingleLink({
         request: { query: transformedMutation },
         result: { data: transformedMutationResult },
-      }).setOnError(reject),
+      }),
       config: { addTypename: true },
     })
       .mutate({ mutation: mutation })
@@ -2025,7 +2025,7 @@ describe('QueryManager', () => {
       }, {
         request: { query: query1 },
         result: { data: data1 },
-      }).setOnError(reject),
+      }),
       config: reducerConfig,
     });
 
@@ -2116,7 +2116,7 @@ describe('QueryManager', () => {
       }, {
         request: { query: query2 },
         result: { data: data2 },
-      }).setOnError(reject),
+      }),
     });
 
     const observable1 = queryManager.watchQuery<any>({
@@ -2449,7 +2449,7 @@ describe('QueryManager', () => {
       }, {
         request: { query: queryWithId },
         result: { data: dataWithId },
-      }).setOnError(reject),
+      }),
       config: {
         typePolicies: {
           Query: {
@@ -2592,7 +2592,7 @@ describe('QueryManager', () => {
       link: mockSingleLink(
         { request: { query: queryA }, result: { data: dataA } },
         { request: { query: queryB }, result: { data: dataB }, delay: 20 }
-      ).setOnError(reject),
+      ),
       cache: new InMemoryCache({}),
       ssrMode: true,
     });
@@ -2718,7 +2718,7 @@ describe('QueryManager', () => {
         }, {
           request: { query, variables },
           result: { data: data2 },
-        }).setOnError(reject),
+        }),
         cache: new InMemoryCache({ addTypename: false }),
         ssrMode: true,
       });
@@ -3225,7 +3225,7 @@ describe('QueryManager', () => {
         }, {
           request: { query: query2 },
           result: { data: data2Changed },
-        }).setOnError(reject),
+        }),
       });
 
       const observable = queryManager.watchQuery<any>({ query });
@@ -3256,7 +3256,7 @@ describe('QueryManager', () => {
 
     itAsync('should change the store state to an empty state', (resolve, reject) => {
       const queryManager = createQueryManager({
-        link: mockSingleLink().setOnError(reject),
+        link: mockSingleLink(),
       });
 
       queryManager.resetStore();
@@ -3525,7 +3525,7 @@ describe('QueryManager', () => {
       `;
 
       const queryManager = createQueryManager({
-        link: mockSingleLink().setOnError(reject),
+        link: mockSingleLink(),
       });
 
       const options = {
@@ -3560,7 +3560,7 @@ describe('QueryManager', () => {
       `;
 
       const queryManager = createQueryManager({
-        link: mockSingleLink().setOnError(reject),
+        link: mockSingleLink(),
       });
 
       const options = {
@@ -3683,7 +3683,7 @@ describe('QueryManager', () => {
         }, {
           request: { query: query2 },
           result: { data: data2Changed },
-        }).setOnError(reject),
+        }),
       });
 
       const observable = queryManager.watchQuery<any>({ query });
@@ -3926,7 +3926,7 @@ describe('QueryManager', () => {
       `;
 
       const queryManager = createQueryManager({
-        link: mockSingleLink().setOnError(reject),
+        link: mockSingleLink(),
       });
 
       const options = {
@@ -3961,7 +3961,7 @@ describe('QueryManager', () => {
       `;
 
       const queryManager = createQueryManager({
-        link: mockSingleLink().setOnError(reject),
+        link: mockSingleLink(),
       });
 
       const options = {
@@ -3996,7 +3996,7 @@ describe('QueryManager', () => {
       `;
 
       const queryManager = createQueryManager({
-        link: mockSingleLink().setOnError(reject),
+        link: mockSingleLink(),
       });
 
       const options = {
@@ -5068,7 +5068,7 @@ describe('QueryManager', () => {
         { request: { query: query2 }, result: { data: { two: 2 } } },
         { request: { query: query3 }, result: { data: { three: 3 } } },
         { request: { query: query4 }, result: { data: { four: 4 } } }
-      ).setOnError(reject);
+      );
       const cache = new InMemoryCache();
 
       const queryManager = new QueryManager<NormalizedCacheObject>({
@@ -5124,7 +5124,7 @@ describe('QueryManager', () => {
           link: mockSingleLink({
             request: { query },
             result: { data },
-          }).setOnError(reject),
+          }),
         });
 
         const observable = queryManager.watchQuery<any>({
@@ -5162,7 +5162,7 @@ describe('QueryManager', () => {
       const link = mockSingleLink({
         request: { query },
         result: { data },
-      }).setOnError(reject);
+      });
 
       const clientAwareness = {
         name: 'Test',
diff --git a/src/core/__tests__/fetchPolicies.ts b/src/core/__tests__/fetchPolicies.ts
index b67128eb701..941f06a479b 100644
--- a/src/core/__tests__/fetchPolicies.ts
+++ b/src/core/__tests__/fetchPolicies.ts
@@ -63,7 +63,7 @@ const createLink = (reject: (reason: any) => any) =>
   }, {
     request: { query },
     result: { data: result },
-  }).setOnError(reject);
+  });
 
 const createFailureLink = () =>
   mockSingleLink({
@@ -87,7 +87,7 @@ const createMutationLink = (reject: (reason: any) => any) =>
   {
     request: { query },
     result: { data: merged },
-  }).setOnError(reject);
+  });
 
 describe('network-only', () => {
   itAsync('requests from the network even if already in cache', (resolve, reject) => {
diff --git a/src/react/hooks/__tests__/useMutation.test.tsx b/src/react/hooks/__tests__/useMutation.test.tsx
index de541810bb7..e2ee7273618 100644
--- a/src/react/hooks/__tests__/useMutation.test.tsx
+++ b/src/react/hooks/__tests__/useMutation.test.tsx
@@ -452,7 +452,7 @@ describe('useMutation Hook', () => {
         }
       ];
 
-      const link = mockSingleLink(...mocks).setOnError(reject);
+      const link = mockSingleLink(...mocks);
       const cache = new InMemoryCache();
       const client = new ApolloClient({
         cache,
diff --git a/src/react/hooks/__tests__/useQuery.test.tsx b/src/react/hooks/__tests__/useQuery.test.tsx
index f3b42d701d8..6379b82121c 100644
--- a/src/react/hooks/__tests__/useQuery.test.tsx
+++ b/src/react/hooks/__tests__/useQuery.test.tsx
@@ -361,7 +361,7 @@ describe('useQuery Hook', () => {
       }
 
       render(
-        <MockedProvider link={new MockLink(CAR_MOCKS).setOnError(reject)}>
+        <MockedProvider link={new MockLink(CAR_MOCKS)}>
           <Fragment>
             <WrapperComponent something={1} />
             <WrapperComponent something={3} />
@@ -538,7 +538,7 @@ describe('useQuery Hook', () => {
       };
 
       render(
-        <MockedProvider link={new MockLink(CAR_MOCKS).setOnError(reject)}>
+        <MockedProvider link={new MockLink(CAR_MOCKS)}>
           <Component />
         </MockedProvider>
       );
@@ -556,7 +556,7 @@ describe('useQuery Hook', () => {
         ...CAR_MOCKS,
       ];
 
-      const mockLink = new MockLink(mocks).setOnError(reject);
+      const mockLink = new MockLink(mocks);
 
       const linkRequestSpy = jest.spyOn(mockLink, 'request');
 
@@ -628,7 +628,7 @@ describe('useQuery Hook', () => {
         const mocks = [...CAR_MOCKS, ...CAR_MOCKS];
 
         unmount = render(
-          <MockedProvider link={new MockLink(mocks).setOnError(reject)}>
+          <MockedProvider link={new MockLink(mocks)}>
             <Component />
           </MockedProvider>
         ).unmount;
@@ -847,7 +847,7 @@ describe('useQuery Hook', () => {
         mocks.push(...mocks);
         mocks.push(...mocks);
 
-        const link = new MockLink(mocks).setOnError(reject);
+        const link = new MockLink(mocks);
 
         let renderCount = 0;
         function App() {