diff --git a/slogtest_test.go b/slogtest_test.go
new file mode 100644
index 0000000..f013150
--- /dev/null
+++ b/slogtest_test.go
@@ -0,0 +1,64 @@
+package slogdedup_test
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log/slog"
+	"testing"
+	"testing/slogtest"
+
+	slogdedup "github.com/veqryn/slog-dedup"
+)
+
+func TestSlogtest(t *testing.T) {
+	for _, test := range []struct {
+		name  string
+		new   func(io.Writer) slog.Handler
+		parse func([]byte) (map[string]any, error)
+	}{
+		{"OverwriteHandler", func(w io.Writer) slog.Handler { return slogdedup.NewOverwriteHandler(slog.NewJSONHandler(w, nil), nil) }, parseJSON},
+		{"IgnoreHandler", func(w io.Writer) slog.Handler { return slogdedup.NewIgnoreHandler(slog.NewJSONHandler(w, nil), nil) }, parseJSON},
+		{"IncrementHandler", func(w io.Writer) slog.Handler { return slogdedup.NewIncrementHandler(slog.NewJSONHandler(w, nil), nil) }, parseJSON},
+		{"AppendHandler", func(w io.Writer) slog.Handler { return slogdedup.NewAppendHandler(slog.NewJSONHandler(w, nil), nil) }, parseJSON},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			var buf bytes.Buffer
+			h := test.new(&buf)
+			results := func() []map[string]any {
+				ms, err := parseLines(buf.Bytes(), test.parse)
+				if err != nil {
+					t.Fatal(err)
+				}
+				return ms
+			}
+			if err := slogtest.TestHandler(h, results); err != nil {
+				t.Fatal(err)
+			}
+		})
+	}
+}
+
+func parseLines(src []byte, parse func([]byte) (map[string]any, error)) ([]map[string]any, error) {
+	var records []map[string]any
+	for _, line := range bytes.Split(src, []byte{'\n'}) {
+		if len(line) == 0 {
+			continue
+		}
+		m, err := parse(line)
+		if err != nil {
+			return nil, fmt.Errorf("%s: %w", string(line), err)
+		}
+		records = append(records, m)
+	}
+	return records, nil
+}
+
+func parseJSON(bs []byte) (map[string]any, error) {
+	var m map[string]any
+	if err := json.Unmarshal(bs, &m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}