diff --git a/packages/upgrade/src/common/src/angular1.ts b/packages/upgrade/src/common/src/angular1.ts
index efe8d0bd59..9615a3c927 100644
--- a/packages/upgrade/src/common/src/angular1.ts
+++ b/packages/upgrade/src/common/src/angular1.ts
@@ -116,9 +116,7 @@ export interface ITranscludeFunction {
   // If one argument is provided, then it's assumed to be the cloneAttachFn.
   (cloneAttachFn?: ICloneAttachFunction): IAugmentedJQuery;
 }
-export interface ICloneAttachFunction {
-  (clonedElement: IAugmentedJQuery, scope: IScope): any;
-}
+export interface ICloneAttachFunction { (clonedElement: IAugmentedJQuery, scope: IScope): any; }
 export type IAugmentedJQuery = Node[] & {
   on?: (name: string, fn: () => void) => void;
   data?: (name: string, value?: any) => any;
diff --git a/packages/upgrade/src/common/test/helpers/common_test_helpers.ts b/packages/upgrade/src/common/test/helpers/common_test_helpers.ts
index 209d4304bc..436f6261d9 100644
--- a/packages/upgrade/src/common/test/helpers/common_test_helpers.ts
+++ b/packages/upgrade/src/common/test/helpers/common_test_helpers.ts
@@ -124,7 +124,7 @@ export function createWithEachNg1VersionFn(setNg1: typeof setAngularJSGlobal) {
         delete win.angular;
       });
 
-      methodsToPatch.forEach(method => win[method](function() {
+      methodsToPatch.forEach(method => win[method](function(this: unknown) {
                                // Run the captured callbacks. (Async callbacks not supported.)
                                methodCallbacks[method].forEach(cb => cb.call(this));
                              }));
diff --git a/packages/upgrade/src/dynamic/src/upgrade_adapter.ts b/packages/upgrade/src/dynamic/src/upgrade_adapter.ts
index ff35f0a1c2..4232b2690f 100644
--- a/packages/upgrade/src/dynamic/src/upgrade_adapter.ts
+++ b/packages/upgrade/src/dynamic/src/upgrade_adapter.ts
@@ -537,8 +537,8 @@ export class UpgradeAdapter {
                 function(testabilityDelegate: ITestabilityService) {
                   const originalWhenStable: Function = testabilityDelegate.whenStable;
                   // Cannot use arrow function below because we need the context
-                  const newWhenStable = function(callback: Function) {
-                    originalWhenStable.call(this, function() {
+                  const newWhenStable = function(this: unknown, callback: Function) {
+                    originalWhenStable.call(this, function(this: unknown) {
                       const ng2Testability: Testability =
                           upgradeAdapter.moduleRef !.injector.get(Testability);
                       if (ng2Testability.isStable()) {
@@ -670,7 +670,7 @@ class ParentInjectorPromise {
  */
 export class UpgradeAdapterRef {
   /* @internal */
-  private _readyFn: ((upgradeAdapterRef?: UpgradeAdapterRef) => void)|null = null;
+  private _readyFn: ((upgradeAdapterRef: UpgradeAdapterRef) => void)|null = null;
 
   public ng1RootScope: IRootScopeService = null !;
   public ng1Injector: IInjectorService = null !;