diff --git a/util/testutil/integration/run.go b/util/testutil/integration/run.go
index c087c7cb6..fefbb167c 100644
--- a/util/testutil/integration/run.go
+++ b/util/testutil/integration/run.go
@@ -360,37 +360,80 @@ func lazyMirrorRunnerFunc(t *testing.T, images map[string]string) func() string
 	var mirror string
 	return func() string {
 		once.Do(func() {
-			host, cleanup, err := runMirror(t, images)
+			m, err := RunMirror()
 			require.NoError(t, err)
-			t.Cleanup(func() { _ = cleanup() })
-			mirror = host
+			require.NoError(t, m.AddImages(t, images))
+			t.Cleanup(func() { _ = m.Close() })
+			mirror = m.Host
 		})
 		return mirror
 	}
 }
 
-func runMirror(t *testing.T, mirroredImages map[string]string) (host string, _ func() error, err error) {
+type Mirror struct {
+	Host    string
+	dir     string
+	cleanup func() error
+}
+
+func (m *Mirror) lock() (*flock.Flock, error) {
+	if m.dir == "" {
+		return nil, nil
+	}
+	if err := os.MkdirAll(m.dir, 0700); err != nil {
+		return nil, err
+	}
+	lock := flock.New(filepath.Join(m.dir, "lock"))
+	if err := lock.Lock(); err != nil {
+		return nil, err
+	}
+	return lock, nil
+}
+
+func (m *Mirror) Close() error {
+	if m.cleanup != nil {
+		return m.cleanup()
+	}
+	return nil
+}
+
+func (m *Mirror) AddImages(t *testing.T, images map[string]string) (err error) {
+	lock, err := m.lock()
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if lock != nil {
+			lock.Unlock()
+		}
+	}()
+
+	if err := copyImagesLocal(t, m.Host, images); err != nil {
+		return err
+	}
+	return nil
+}
+
+func RunMirror() (_ *Mirror, err error) {
 	mirrorDir := os.Getenv("BUILDKIT_REGISTRY_MIRROR_DIR")
 
-	var lock *flock.Flock
-	if mirrorDir != "" {
-		if err := os.MkdirAll(mirrorDir, 0700); err != nil {
-			return "", nil, err
-		}
-		lock = flock.New(filepath.Join(mirrorDir, "lock"))
-		if err := lock.Lock(); err != nil {
-			return "", nil, err
-		}
-		defer func() {
-			if err != nil {
-				lock.Unlock()
-			}
-		}()
+	m := &Mirror{
+		dir: mirrorDir,
 	}
 
-	mirror, cleanup, err := NewRegistry(mirrorDir)
+	lock, err := m.lock()
 	if err != nil {
-		return "", nil, err
+		return nil, err
+	}
+	defer func() {
+		if err != nil {
+			lock.Unlock()
+		}
+	}()
+
+	host, cleanup, err := NewRegistry(mirrorDir)
+	if err != nil {
+		return nil, err
 	}
 	defer func() {
 		if err != nil {
@@ -398,17 +441,16 @@ func runMirror(t *testing.T, mirroredImages map[string]string) (host string, _ f
 		}
 	}()
 
-	if err := copyImagesLocal(t, mirror, mirroredImages); err != nil {
-		return "", nil, err
-	}
+	m.Host = host
+	m.cleanup = cleanup
 
-	if mirrorDir != "" {
+	if lock != nil {
 		if err := lock.Unlock(); err != nil {
-			return "", nil, err
+			return nil, err
 		}
 	}
 
-	return mirror, cleanup, err
+	return m, err
 }
 
 type matrixValue struct {
diff --git a/worker/containerd/containerd_test.go b/worker/containerd/containerd_test.go
index f8e7cbae1..04db1b3db 100644
--- a/worker/containerd/containerd_test.go
+++ b/worker/containerd/containerd_test.go
@@ -14,6 +14,11 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+func TestMain(m *testing.M) {
+	defer tests.RunMirror()()
+	m.Run()
+}
+
 func init() {
 	workers.InitContainerdWorker()
 }
diff --git a/worker/runc/runc_test.go b/worker/runc/runc_test.go
index ea58b90d4..82b4c40f5 100644
--- a/worker/runc/runc_test.go
+++ b/worker/runc/runc_test.go
@@ -27,6 +27,11 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+func TestMain(m *testing.M) {
+	defer tests.RunMirror()()
+	m.Run()
+}
+
 func newWorkerOpt(t *testing.T, processMode oci.ProcessMode) base.WorkerOpt {
 	tmpdir := t.TempDir()
 
diff --git a/worker/tests/common.go b/worker/tests/common.go
index 07efebb55..85ac3c24c 100644
--- a/worker/tests/common.go
+++ b/worker/tests/common.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"context"
 	"io"
+	"sync"
 	"testing"
 	"time"
 
@@ -14,14 +15,38 @@ import (
 	"github.com/moby/buildkit/session"
 	"github.com/moby/buildkit/snapshot"
 	"github.com/moby/buildkit/source/containerimage"
+	"github.com/moby/buildkit/util/testutil/integration"
 	"github.com/moby/buildkit/worker/base"
 	"github.com/pkg/errors"
 	"github.com/stretchr/testify/require"
 	"golang.org/x/sync/errgroup"
 )
 
+var mirrorOnce sync.Once
+var mirror *integration.Mirror
+var mirrorMu sync.Mutex
+
+func RunMirror() func() error {
+	mirrorOnce.Do(func() {
+		m, err := integration.RunMirror()
+		if err != nil {
+			panic(err)
+		}
+		mirror = m
+	})
+	return func() error { return mirror.Close() }
+}
+
+func mirrorBusybox(t *testing.T) string {
+	mirrorMu.Lock()
+	defer mirrorMu.Unlock()
+	require.NotNil(t, mirror, "mirror must be initialized")
+	require.NoError(t, mirror.AddImages(t, integration.OfficialImages("busybox:latest")))
+	return mirror.Host + "/library/busybox:latest"
+}
+
 func NewBusyboxSourceSnapshot(ctx context.Context, t *testing.T, w *base.Worker, sm *session.Manager) cache.ImmutableRef {
-	img, err := containerimage.NewImageIdentifier("docker.io/library/busybox:latest")
+	img, err := containerimage.NewImageIdentifier(mirrorBusybox(t))
 	require.NoError(t, err)
 	src, err := w.SourceManager.Resolve(ctx, img, sm, nil)
 	require.NoError(t, err)