diff --git a/lib/git-process.ts b/lib/git-process.ts
index 6ed4844e..87e0b392 100644
--- a/lib/git-process.ts
+++ b/lib/git-process.ts
@@ -34,7 +34,7 @@ export interface IGitSpawnExecutionOptions {
    * set as environment variables before executing the git
    * process.
    */
-  readonly env?: Object
+  readonly env?: object
 }
 
 /**
@@ -47,7 +47,7 @@ export interface IGitExecutionOptions {
    * set as environment variables before executing the git
    * process.
    */
-  readonly env?: Object
+  readonly env?: object
 
   /**
    * An optional string or buffer which will be written to
diff --git a/test/fast/git-process-test.ts b/test/fast/git-process-test.ts
index 64cb722b..13871cc7 100644
--- a/test/fast/git-process-test.ts
+++ b/test/fast/git-process-test.ts
@@ -195,7 +195,7 @@ describe('git-process', () => {
       try {
         await GitProcess.exec(['show', 'HEAD'], testRepoPath)
       } catch (e) {
-        error = e
+        error = e as Error
       }
 
       expect(error!.message).toBe('Unable to find path to repository on disk.')
diff --git a/test/slow/auth.ts b/test/slow/auth.ts
index 1d44dc6d..1345a2fd 100644
--- a/test/slow/auth.ts
+++ b/test/slow/auth.ts
@@ -24,7 +24,7 @@ const defaultEnv = {
   HOME: ''
 }
 
-export function setupAskPass(username?: string, password?: string): Object {
+export function setupAskPass(username?: string, password?: string): object {
   const auth = {
     TEST_USERNAME: username,
     TEST_PASSWORD: password,
@@ -34,6 +34,6 @@ export function setupAskPass(username?: string, password?: string): Object {
   return Object.assign(auth, defaultEnv)
 }
 
-export function setupNoAuth(): Object {
+export function setupNoAuth(): object {
   return defaultEnv
 }