diff --git a/env/codec_test.go b/env/codec_test.go
index b074a33..29180c5 100644
--- a/env/codec_test.go
+++ b/env/codec_test.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"testing"
 
-	"github.com/eslider/go-config/testfixtures"
+	"github.com/eslider/go-config/internal/testfixtures"
 )
 
 type identityRoot struct {
diff --git a/ini/codec_test.go b/ini/codec_test.go
index 7050275..2dfd9e1 100644
--- a/ini/codec_test.go
+++ b/ini/codec_test.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"testing"
 
-	"github.com/eslider/go-config/testfixtures"
+	"github.com/eslider/go-config/internal/testfixtures"
 )
 
 func TestCodec_IdentityINIFixture(t *testing.T) {
diff --git a/testfixtures/testfixtures.go b/internal/testfixtures/testfixtures.go
similarity index 100%
rename from testfixtures/testfixtures.go
rename to internal/testfixtures/testfixtures.go
diff --git a/json/codec_test.go b/json/codec_test.go
index 8f25fd0..293c55f 100644
--- a/json/codec_test.go
+++ b/json/codec_test.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"testing"
 
-	"github.com/eslider/go-config/testfixtures"
+	"github.com/eslider/go-config/internal/testfixtures"
 )
 
 func TestCodec_IdentityJSONFixture(t *testing.T) {
diff --git a/yaml/codec_test.go b/yaml/codec_test.go
index a38d2ff..037b9b1 100644
--- a/yaml/codec_test.go
+++ b/yaml/codec_test.go
@@ -7,7 +7,7 @@ import (
 
 	"github.com/eslider/go-config/internal/keymap"
 	"github.com/eslider/go-config/internal/merge"
-	"github.com/eslider/go-config/testfixtures"
+	"github.com/eslider/go-config/internal/testfixtures"
 	yaml3 "gopkg.in/yaml.v3"
 )
 
diff --git a/yaml/error_test.go b/yaml/error_test.go
index 7c59c7d..8f76ac8 100644
--- a/yaml/error_test.go
+++ b/yaml/error_test.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"testing"
 
-	"github.com/eslider/go-config/testfixtures"
+	"github.com/eslider/go-config/internal/testfixtures"
 )
 
 func TestCodec_InvalidYAML(t *testing.T) {