diff --git a/drivers/graphtest/graphtest_unix.go b/drivers/graphtest/graphtest_unix.go
index 51736416c6..d641095478 100644
--- a/drivers/graphtest/graphtest_unix.go
+++ b/drivers/graphtest/graphtest_unix.go
@@ -39,15 +39,15 @@ const (
 type Driver struct {
 	graphdriver.Driver
 	root     string
-	runroot  string
+	runRoot  string
 	refCount int
 }
 
-func newGraphDriver(t testing.TB, name string, options []string, root string, runroot string) graphdriver.Driver {
-	d, err := graphdriver.GetDriver(name, graphdriver.Options{DriverOptions: options, Root: root, RunRoot: runroot})
+func newGraphDriver(t testing.TB, name string, options []string, root string, runRoot string) graphdriver.Driver {
+	d, err := graphdriver.GetDriver(name, graphdriver.Options{DriverOptions: options, Root: root, RunRoot: runRoot})
 	if err != nil {
 		t.Logf("graphdriver: %v\n", err)
-		os.RemoveAll(runroot)
+		os.RemoveAll(runRoot)
 		os.RemoveAll(root)
 		if errors.Is(err, graphdriver.ErrNotSupported) || errors.Is(err, graphdriver.ErrPrerequisites) || errors.Is(err, graphdriver.ErrIncompatibleFS) {
 			t.Skipf("Driver %s not supported", name)
@@ -64,17 +64,17 @@ func newGraphDriver(t testing.TB, name string, options []string, root string, ru
 func newDriver(t testing.TB, name string, options []string) *Driver {
 	root, err := os.MkdirTemp("", "storage-graphtest-")
 	require.NoError(t, err)
-	runroot, err := os.MkdirTemp("", "storage-graphtest-")
+	runRoot, err := os.MkdirTemp("", "storage-graphtest-")
 	require.NoError(t, err)
 
-	return &Driver{newGraphDriver(t, name, options, root, runroot), root, runroot, 1}
+	return &Driver{newGraphDriver(t, name, options, root, runRoot), root, runRoot, 1}
 }
 
 func cleanup(t testing.TB, d *Driver) {
 	if err := drv.Cleanup(); err != nil {
 		t.Fatal(err)
 	}
-	os.RemoveAll(d.runroot)
+	os.RemoveAll(d.runRoot)
 	os.RemoveAll(d.root)
 }
 
@@ -100,7 +100,7 @@ func ReconfigureDriver(t testing.TB, name string, options ...string) {
 	if err := drv.Cleanup(); err != nil {
 		t.Fatal(err)
 	}
-	drv.Driver = newGraphDriver(t, name, options, drv.root, drv.runroot)
+	drv.Driver = newGraphDriver(t, name, options, drv.root, drv.runRoot)
 }
 
 // PutDriver removes the driver if it is no longer used and updates the reference count.