diff --git a/pkg/outputter.go b/pkg/outputter.go
index 1960be9b..d35653bc 100644
--- a/pkg/outputter.go
+++ b/pkg/outputter.go
@@ -210,6 +210,7 @@ func parseConfigTemplates(ctx context.Context, c *config.Config, iface *Interfac
 	data := struct {
 		InterfaceDir            string
 		InterfaceDirRelative    string
+		InterfaceFile           string
 		InterfaceName           string
 		InterfaceNameCamel      string
 		InterfaceNameLowerCamel string
@@ -222,6 +223,7 @@ func parseConfigTemplates(ctx context.Context, c *config.Config, iface *Interfac
 	}{
 		InterfaceDir:         filepath.Dir(iface.FileName),
 		InterfaceDirRelative: interfaceDirRelative,
+		InterfaceFile:        iface.FileName,
 		InterfaceName:        iface.Name,
 		// Deprecated: All custom case variables of InterfaceName will be removed in the next major version
 		// Use the template functions instead
diff --git a/pkg/outputter_test.go b/pkg/outputter_test.go
index 8c7b860c..5e21d821 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}}_{{.InterfaceNameLower}}.go",
+					FileName: "{{.InterfaceName}}_{{.InterfaceNameCamel}}_{{.InterfaceNameSnake}}_{{.InterfaceNameLower}}_{{base .InterfaceFile}}",
 					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_foobar.go",
+				FileName: "FooBar_FooBar_foo_bar_foobar_foobar.go",
 				MockName: "fooBar",
 				Outpkg:   "packageName",
 			},