diff --git a/pkg/outputter.go b/pkg/outputter.go
index 5f1caed8..2d7fe931 100644
--- a/pkg/outputter.go
+++ b/pkg/outputter.go
@@ -206,6 +206,7 @@ func parseConfigTemplates(ctx context.Context, c *config.Config, iface *Interfac
 		InterfaceNameCamel      string
 		InterfaceNameLowerCamel string
 		InterfaceNameSnake      string
+		InterfaceNameLower      string
 		Mock                    string
 		MockName                string
 		PackageName             string
@@ -217,6 +218,7 @@ func parseConfigTemplates(ctx context.Context, c *config.Config, iface *Interfac
 		InterfaceNameCamel:      strcase.ToCamel(iface.Name),
 		InterfaceNameLowerCamel: strcase.ToLowerCamel(iface.Name),
 		InterfaceNameSnake:      strcase.ToSnake(iface.Name),
+		InterfaceNameLower:      strings.ToLower(iface.Name),
 		Mock:                    mock,
 		MockName:                c.MockName,
 		PackageName:             iface.Pkg.Name(),
diff --git a/pkg/outputter_test.go b/pkg/outputter_test.go
index 4e224c55..013140f9 100644
--- a/pkg/outputter_test.go
+++ b/pkg/outputter_test.go
@@ -97,7 +97,7 @@ func Test_parseConfigTemplates(t *testing.T) {
 			args: args{
 				c: &config.Config{
 					Dir:      "{{.InterfaceDir}}/{{.PackagePath}}",
-					FileName: "{{.InterfaceName}}_{{.InterfaceNameCamel}}_{{.InterfaceNameSnake}}.go",
+					FileName: "{{.InterfaceName}}_{{.InterfaceNameCamel}}_{{.InterfaceNameSnake}}_{{.InterfaceNameLower}}.go",
 					MockName: "{{.InterfaceNameLowerCamel}}",
 					Outpkg:   "{{.PackageName}}",
 				},
@@ -110,7 +110,7 @@ func Test_parseConfigTemplates(t *testing.T) {
 			pkg: mockPkg,
 			want: &config.Config{
 				Dir:      "path/to/github.com/user/project/package",
-				FileName: "FooBar_FooBar_foo_bar.go",
+				FileName: "FooBar_FooBar_foo_bar_foobar.go",
 				MockName: "fooBar",
 				Outpkg:   "packageName",
 			},