diff --git a/assertions.go b/assertions.go
index c65919f..192419d 100644
--- a/assertions.go
+++ b/assertions.go
@@ -9,20 +9,28 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-type testingT struct {
+// TestingT is an interface wrapper around *testing.T.
+type TestingT interface {
+	Errorf(format string, args ...interface{})
+	FailNow()
+	Log(args ...interface{})
+	Logf(format string, args ...interface{})
+}
+
+type tError struct {
 	err error
 }
 
-func (t *testingT) Errorf(format string, args ...interface{}) {
+func (t *tError) Errorf(format string, args ...interface{}) {
 	t.err = fmt.Errorf(format, args...) // nolint: goerr113
 }
 
-func (t *testingT) LastError() error {
+func (t *tError) LastError() error {
 	return t.err
 }
 
-func t() *testingT {
-	return &testingT{}
+func teeError() *tError {
+	return &tError{}
 }
 
 // AssertState asserts console state.
diff --git a/assertions_test.go b/assertions_test.go
index 1bf6805..47ba2c1 100644
--- a/assertions_test.go
+++ b/assertions_test.go
@@ -9,8 +9,8 @@ import (
 func TestTestingT_LastError(t *testing.T) {
 	t.Parallel()
 
-	newT := &testingT{}
-	newT.Errorf("error: %s", "unknown")
+	tee := teeError()
+	tee.Errorf("error: %s", "unknown")
 
-	assert.EqualError(t, newT.LastError(), `error: unknown`)
+	assert.EqualError(t, tee.LastError(), `error: unknown`)
 }
diff --git a/manager.go b/manager.go
index 4b28d0b..30a4594 100644
--- a/manager.go
+++ b/manager.go
@@ -1,7 +1,6 @@
 package consoledog
 
 import (
-	"testing"
 	"time"
 
 	"github.com/Netflix/go-expect"
@@ -21,7 +20,7 @@ type Option func(m *Manager)
 
 // Manager manages console and its state.
 type Manager struct {
-	test *testing.T
+	test TestingT
 
 	console *expect.Console
 	state   *vt10x.State
@@ -98,7 +97,7 @@ func (m *Manager) Flush() {
 func (m *Manager) isConsoleOutput(expected *godog.DocString) error {
 	m.Flush()
 
-	t := t()
+	t := teeError()
 	AssertState(t, m.state, expected.Content)
 
 	return t.LastError()
@@ -119,7 +118,7 @@ func (m *Manager) WithCloser(c Closer) *Manager {
 }
 
 // New initiates a new console Manager.
-func New(t *testing.T, options ...Option) *Manager { // nolint: thelper
+func New(t TestingT, options ...Option) *Manager {
 	m := &Manager{
 		test: t,
 	}