diff --git a/__tests__/buildx/buildx.test.ts b/__tests__/buildx/buildx.test.ts
index 835b44b..d7c6445 100644
--- a/__tests__/buildx/buildx.test.ts
+++ b/__tests__/buildx/buildx.test.ts
@@ -68,6 +68,24 @@ describe('configDir', () => {
   });
 });
 
+describe('certsDir', () => {
+  const originalEnv = process.env;
+  beforeEach(() => {
+    jest.resetModules();
+    process.env = {
+      ...originalEnv,
+      BUILDX_CONFIG: '/var/docker/buildx'
+    };
+  });
+  afterEach(() => {
+    process.env = originalEnv;
+  });
+  it('returns default', async () => {
+    process.env.BUILDX_CONFIG = '/var/docker/buildx';
+    expect(Buildx.certsDir).toEqual(path.join('/var/docker/buildx', 'certs'));
+  });
+});
+
 describe('isAvailable', () => {
   it('docker cli', async () => {
     const execSpy = jest.spyOn(exec, 'getExecOutput');
diff --git a/src/buildx/buildx.ts b/src/buildx/buildx.ts
index 30b47c0..7dac1d7 100644
--- a/src/buildx/buildx.ts
+++ b/src/buildx/buildx.ts
@@ -47,6 +47,10 @@ export class Buildx {
     return process.env.BUILDX_CONFIG || path.join(Docker.configDir, 'buildx');
   }
 
+  static get certsDir(): string {
+    return path.join(Buildx.configDir, 'certs');
+  }
+
   public getCommand(args: Array<string>) {
     return {
       command: this.standalone ? 'buildx' : 'docker',