diff --git a/core/installer/soft/repoio_mem.go b/core/installer/soft/repoio_mem.go
new file mode 100644
index 0000000..f0ac1b6
--- /dev/null
+++ b/core/installer/soft/repoio_mem.go
@@ -0,0 +1,46 @@
+package soft
+
+import (
+	"sync"
+	"testing"
+)
+
+type mockRepoIO struct {
+	RepoFS
+	addr string
+	t    *testing.T
+	l    sync.Locker
+}
+
+func NewMockRepoIO(fs RepoFS, addr string, t *testing.T) RepoIO {
+	return &mockRepoIO{
+		RepoFS: fs,
+		addr:   addr,
+		t:      t,
+		l:      &sync.Mutex{},
+	}
+}
+
+func (r mockRepoIO) FullAddress() string {
+	return r.addr
+}
+
+func (r mockRepoIO) Pull() error {
+	r.t.Logf("Pull: %s", r.addr)
+	return nil
+}
+
+func (r mockRepoIO) CommitAndPush(message string, opts ...PushOption) (string, error) {
+	r.t.Logf("Commit and push: %s", message)
+	return "", nil
+}
+
+func (r mockRepoIO) Do(op DoFn, _ ...DoOption) (string, error) {
+	r.l.Lock()
+	defer r.l.Unlock()
+	msg, err := op(r)
+	if err != nil {
+		return "", err
+	}
+	return r.CommitAndPush(msg)
+}
diff --git a/core/installer/welcome/env_test.go b/core/installer/welcome/env_test.go
index e7e75a8..f41110d 100644
--- a/core/installer/welcome/env_test.go
+++ b/core/installer/welcome/env_test.go
@@ -260,7 +260,7 @@
 	jc := fakeJobCreator{t}
 	hf := fakeHelmFetcher{t}
 	lg := installer.GitRepositoryLocalChartGenerator{"foo", "bar"}
-	infraRepo := mockRepoIO{soft.NewBillyRepoFS(infraFS), "foo.bar", t, &sync.Mutex{}}
+	infraRepo := soft.NewMockRepoIO(soft.NewBillyRepoFS(infraFS), "foo.bar", t)
 	infraMgr, err := installer.NewInfraAppManager(infraRepo, nsCreator, hf, lg)
 	if err != nil {
 		t.Fatal(err)