diff --git a/lib/plugins/plugin-validator.spec.js b/lib/plugins/plugin-validator.spec.js
index 3fcc820249..a0a776f825 100644
--- a/lib/plugins/plugin-validator.spec.js
+++ b/lib/plugins/plugin-validator.spec.js
@@ -47,12 +47,10 @@ describe('plugin-validator', () => {
       testScope.fileSystem.writeFile(['govuk-prototype-kit.config.json'], JSON.stringify({
         myExample: ['abc']
       }))
-      await validatePlugin(testScope.mockFileSystemRoot).finally(
-        () => {
-          expect(testScope.errLogs).toEqual([ansiColors.red('Error: The following invalid keys exist in your config: myExample')])
-          expect(testScope.stdLogs).toEqual(phaseOneSuccessMessages)
-        }
-      )
+      await validatePlugin(testScope.mockFileSystemRoot)
+      expect(testScope.errLogs).toEqual([ansiColors.red('Error: The following invalid keys exist in your config: myExample')])
+      expect(testScope.stdLogs).toEqual(phaseOneSuccessMessages)
+      process.exitCode = 0
     })
     it('should allow a single unknown key when specified', async () => {
       testScope.fileSystem.writeFile(['govuk-prototype-kit.config.json'], JSON.stringify({
@@ -62,11 +60,9 @@ describe('plugin-validator', () => {
         options: {
           keysToIgnoreIfUnknown: 'myExample'
         }
-      }).finally(
-        () => {
-          expect(testScope.errLogs).toEqual([])
-          expect(testScope.stdLogs).toEqual(validSuccessMessages)
-        })
+      })
+      expect(testScope.errLogs).toEqual([])
+      expect(testScope.stdLogs).toEqual(validSuccessMessages)
     })
     it('should allow multiple unknown keys when specified', async () => {
       testScope.fileSystem.writeFile(['govuk-prototype-kit.config.json'], JSON.stringify({
@@ -78,11 +74,9 @@ describe('plugin-validator', () => {
         options: {
           keysToIgnoreIfUnknown: 'myExample,anotherExample,third'
         }
-      }).finally(
-        () => {
-          expect(testScope.errLogs).toEqual([])
-          expect(testScope.stdLogs).toEqual(validSuccessMessages)
-        })
+      })
+      expect(testScope.errLogs).toEqual([])
+      expect(testScope.stdLogs).toEqual(validSuccessMessages)
     })
   })