diff --git a/packages/jest-haste-map/src/__tests__/index.test.js b/packages/jest-haste-map/src/__tests__/index.test.js
index b93a752a096d..013de8971133 100644
--- a/packages/jest-haste-map/src/__tests__/index.test.js
+++ b/packages/jest-haste-map/src/__tests__/index.test.js
@@ -346,6 +346,14 @@ describe('HasteMap', () => {
     expect(hasteFS.matchFiles('.git')).toEqual([]);
   });
 
+  it('ignores sapling vcs directories without ignore pattern', async () => {
+    mockFs[path.join('/', 'project', 'fruits', '.sl', 'package.json')] = `
+      invalid}{
+    `;
+    const {hasteFS} = await (await HasteMap.create(defaultConfig)).build();
+    expect(hasteFS.matchFiles('.sl')).toEqual([]);
+  });
+
   it('ignores vcs directories with ignore pattern regex', async () => {
     const config = {...defaultConfig, ignorePattern: /Kiwi/};
     mockFs[path.join('/', 'project', 'fruits', 'Kiwi.js')] = `
diff --git a/packages/jest-haste-map/src/index.ts b/packages/jest-haste-map/src/index.ts
index 5c3458c96686..e4ddf1e1f856 100644
--- a/packages/jest-haste-map/src/index.ts
+++ b/packages/jest-haste-map/src/index.ts
@@ -125,7 +125,7 @@ const CHANGE_INTERVAL = 30;
 const MAX_WAIT_TIME = 240000;
 const NODE_MODULES = `${path.sep}node_modules${path.sep}`;
 const PACKAGE_JSON = `${path.sep}package.json`;
-const VCS_DIRECTORIES = ['.git', '.hg']
+const VCS_DIRECTORIES = ['.git', '.hg', '.sl']
   .map(vcs => escapePathForRegex(path.sep + vcs + path.sep))
   .join('|');