diff --git a/output_tests/map_key_text_marshal/struct_alias/json_test.go b/output_tests/map_key_text_marshal/struct_alias/json_test.go
deleted file mode 100644
index 8c7d795..0000000
--- a/output_tests/map_key_text_marshal/struct_alias/json_test.go
+++ /dev/null
@@ -1,152 +0,0 @@
-package test
-
-import (
-	"bytes"
-	"encoding/json"
-	"fmt"
-	"strings"
-	"testing"
-
-	"github.com/davecgh/go-spew/spew"
-	fuzz "github.com/google/gofuzz"
-	jsoniter "github.com/json-iterator/go"
-)
-
-func Test_Roundtrip(t *testing.T) {
-	fz := fuzz.New().MaxDepth(10).NilChance(0.3)
-	for i := 0; i < 1000; i++ {
-		var before T
-		fz.Fuzz(&before)
-
-		jbStd, err := json.Marshal(before)
-		if err != nil {
-			t.Fatalf("failed to marshal with stdlib: %v", err)
-		}
-		if len(strings.TrimSpace(string(jbStd))) == 0 {
-			t.Fatal("stdlib marshal produced empty result and no error")
-		}
-		jbIter, err := jsoniter.ConfigCompatibleWithStandardLibrary.Marshal(before)
-		if err != nil {
-			t.Fatalf("failed to marshal with jsoniter: %v", err)
-		}
-		if len(strings.TrimSpace(string(jbIter))) == 0 {
-			t.Fatal("jsoniter marshal produced empty result and no error")
-		}
-		if string(jbStd) != string(jbIter) {
-			t.Fatalf("marshal expected:\n    %s\ngot:\n    %s\nobj:\n    %s",
-				indent(jbStd, "    "), indent(jbIter, "    "), dump(before))
-		}
-
-		var afterStd T
-		err = json.Unmarshal(jbIter, &afterStd)
-		if err != nil {
-			t.Fatalf("failed to unmarshal with stdlib: %v\nvia:\n    %s",
-				err, indent(jbIter, "    "))
-		}
-		var afterIter T
-		err = jsoniter.ConfigCompatibleWithStandardLibrary.Unmarshal(jbIter, &afterIter)
-		if err != nil {
-			t.Fatalf("failed to unmarshal with jsoniter: %v\nvia:\n    %s",
-				err, indent(jbIter, "    "))
-		}
-		if fingerprint(afterStd) != fingerprint(afterIter) {
-			t.Fatalf("unmarshal expected:\n    %s\ngot:\n    %s\nvia:\n    %s",
-				dump(afterStd), dump(afterIter), indent(jbIter, "    "))
-		}
-	}
-}
-
-const indentStr = ">  "
-
-func fingerprint(obj interface{}) string {
-	c := spew.ConfigState{
-		SortKeys: true,
-		SpewKeys: true,
-	}
-	return c.Sprintf("%v", obj)
-}
-
-func dump(obj interface{}) string {
-	cfg := spew.ConfigState{
-		Indent: indentStr,
-	}
-	return cfg.Sdump(obj)
-}
-
-func indent(src []byte, prefix string) string {
-	var buf bytes.Buffer
-	err := json.Indent(&buf, src, prefix, indentStr)
-	if err != nil {
-		return fmt.Sprintf("!!! %v", err)
-	}
-	return buf.String()
-}
-
-func benchmarkMarshal(t *testing.B, name string, fn func(interface{}) ([]byte, error)) {
-	t.ReportAllocs()
-	t.ResetTimer()
-
-	var obj T
-	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
-	fz.Fuzz(&obj)
-	for i := 0; i < t.N; i++ {
-		jb, err := fn(obj)
-		if err != nil {
-			t.Fatalf("%s failed to marshal:\n input: %s\n  error: %v", name, dump(obj), err)
-		}
-		_ = jb
-	}
-}
-
-func benchmarkUnmarshal(t *testing.B, name string, fn func(data []byte, v interface{}) error) {
-	t.ReportAllocs()
-	t.ResetTimer()
-
-	var before T
-	fz := fuzz.NewWithSeed(0).MaxDepth(10).NilChance(0.3)
-	fz.Fuzz(&before)
-	jb, err := json.Marshal(before)
-	if err != nil {
-		t.Fatalf("failed to marshal: %v", err)
-	}
-
-	for i := 0; i < t.N; i++ {
-		var after T
-		err = fn(jb, &after)
-		if err != nil {
-			t.Fatalf("%s failed to unmarshal:\n  input: %q\n  error: %v", name, string(jb), err)
-		}
-	}
-}
-
-func BenchmarkStandardMarshal(t *testing.B) {
-	benchmarkMarshal(t, "stdlib", json.Marshal)
-}
-
-func BenchmarkStandardUnmarshal(t *testing.B) {
-	benchmarkUnmarshal(t, "stdlib", json.Unmarshal)
-}
-
-func BenchmarkJSONIterMarshalFastest(t *testing.B) {
-	benchmarkMarshal(t, "jsoniter-fastest", jsoniter.ConfigFastest.Marshal)
-}
-
-func BenchmarkJSONIterUnmarshalFastest(t *testing.B) {
-	benchmarkUnmarshal(t, "jsoniter-fastest", jsoniter.ConfigFastest.Unmarshal)
-}
-
-func BenchmarkJSONIterMarshalDefault(t *testing.B) {
-	benchmarkMarshal(t, "jsoniter-default", jsoniter.Marshal)
-}
-
-func BenchmarkJSONIterUnmarshalDefault(t *testing.B) {
-	benchmarkUnmarshal(t, "jsoniter-default", jsoniter.Unmarshal)
-}
-
-func BenchmarkJSONIterMarshalCompatible(t *testing.B) {
-	benchmarkMarshal(t, "jsoniter-compat", jsoniter.ConfigCompatibleWithStandardLibrary.Marshal)
-}
-
-func BenchmarkJSONIterUnmarshalCompatible(t *testing.B) {
-	benchmarkUnmarshal(t, "jsoniter-compat", jsoniter.ConfigCompatibleWithStandardLibrary.Unmarshal)
-}
diff --git a/output_tests/map_key_text_marshal/struct_alias/types.go b/output_tests/map_key_text_marshal/struct_alias/types.go
deleted file mode 100644
index 30d61f2..0000000
--- a/output_tests/map_key_text_marshal/struct_alias/types.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package test
-
-import (
-	"encoding"
-	"strings"
-)
-
-type KeyType struct {
-	X string
-}
-
-func (k KeyType) MarshalText() ([]byte, error) {
-	return []byte("MANUAL__" + k.X), nil
-}
-
-func (k *KeyType) UnmarshalText(text []byte) error {
-	k.X = strings.TrimPrefix(string(text), "MANUAL__")
-	return nil
-}
-
-var _ encoding.TextMarshaler = KeyType{}
-var _ encoding.TextUnmarshaler = &KeyType{}
-
-type A KeyType
-
-type T map[A]string