diff --git a/__tests__/export.test.ts b/__tests__/export.test.ts
new file mode 100644
index 0000000..e649fc4
--- /dev/null
+++ b/__tests__/export.test.ts
@@ -0,0 +1,51 @@
+import * as core from '@actions/core'
+import {Filter} from '../src/filter'
+import {File, ChangeStatus} from '../src/file'
+import {exportResults} from '../src/main'
+
+jest.mock('@actions/core', () => ({
+  info: jest.fn(),
+  setFailed: jest.fn(),
+  startGroup: jest.fn(),
+  setOutput: jest.fn(),
+  endGroup: jest.fn()
+}))
+
+describe('set output post filtering', () => {
+  test('correctly sets output', () => {
+    const yaml = `
+    backend:
+      - '!(**/*.tsx|**/*.less)'
+    `
+    const filter = new Filter(yaml)
+    const files = modified(['config/settings.yml'])
+    const match = filter.match(files)
+    exportResults(match, 'none')
+
+    expect(core.setOutput).toHaveBeenCalledWith('changes', '["backend"]')
+  })
+  test('correctly filters out shared from output', () => {
+    const yaml = `
+    shared: &shared
+      - common/**/*
+      - config/**/*
+    src:
+      - *shared
+      - src/**/*
+    backend:
+      - '!(**/*.tsx|**/*.less)'
+    `
+    const filter = new Filter(yaml)
+    const files = modified(['config/settings.yml'])
+    const match = filter.match(files)
+    exportResults(match, 'none')
+
+    expect(core.setOutput).toHaveBeenCalledWith('changes', '["src","backend"]')
+  })
+})
+
+function modified(paths: string[]): File[] {
+  return paths.map(filename => {
+    return {filename, status: ChangeStatus.Modified}
+  })
+}
diff --git a/__tests__/filter.test.ts b/__tests__/filter.test.ts
index 6f5a9b4..7d7da94 100644
--- a/__tests__/filter.test.ts
+++ b/__tests__/filter.test.ts
@@ -1,15 +1,5 @@
-import * as core from '@actions/core'
 import {Filter, FilterConfig, PredicateQuantifier} from '../src/filter'
 import {File, ChangeStatus} from '../src/file'
-import {exportResults} from '../src/main'
-
-jest.mock('@actions/core', () => ({
-  info: jest.fn(),
-  setFailed: jest.fn(),
-  startGroup: jest.fn(),
-  setOutput: jest.fn(),
-  endGroup: jest.fn()
-}))
 
 describe('yaml filter parsing tests', () => {
   test('throws if yaml is not a dictionary', () => {
@@ -170,9 +160,6 @@ describe('matching tests', () => {
     const filter = new Filter(yaml)
     const files = modified(['config/settings.yml'])
     const match = filter.match(files)
-    exportResults(match, 'none')
-
-    expect(core.setOutput).toHaveBeenCalledWith('changes', '["src"]')
     expect(match.src).toEqual(files)
   })
 })