diff --git a/ctx_test.go b/ctx_test.go
new file mode 100644
index 0000000..e4edf68
--- /dev/null
+++ b/ctx_test.go
@@ -0,0 +1,91 @@
+package slogcontext
+
+import (
+	"bytes"
+	"context"
+	"log/slog"
+	"testing"
+)
+
+func TestCtx(t *testing.T) {
+	t.Parallel()
+
+	buf := &bytes.Buffer{}
+	h := slog.NewJSONHandler(buf, &slog.HandlerOptions{
+		AddSource: false,
+		Level:     slog.LevelDebug,
+		ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
+			// fmt.Printf("ReplaceAttr: key:%s valueKind:%s value:%s nilGroups:%t groups:%#+v\n", a.Key, a.Value.Kind().String(), a.Value.String(), groups == nil, groups)
+			if groups == nil && a.Key == slog.TimeKey {
+				return slog.Time(slog.TimeKey, defaultTime)
+			}
+			return a
+		},
+	})
+
+	ctx := ToCtx(context.Background(), slog.New(h))
+
+	ctx = With(ctx, "with1", "arg1", "with1", "arg2")
+	ctx = With(ctx, "with2", "arg1", "with2", "arg2")
+	With(ctx, "with3", "arg1", "with3", "arg2") // Ensure we aren't overwriting the parent context
+
+	WithGroup(ctx, "group0") // Ensure we aren't overwriting the parent context
+	ctx = WithGroup(ctx, "group1")
+	WithGroup(ctx, "group2") // Ensure we aren't overwriting the parent context
+
+	ctx = With(ctx, "with4", "arg1", "with4", "arg2")
+	ctx = With(ctx, "with5", "arg1", "with5", "arg2")
+	With(ctx, "with6", "arg1", "with6", "arg2") // Ensure we aren't overwriting the parent context
+
+	// Test with getting logger back out
+	l := Logger(ctx)
+	l.InfoContext(ctx, "main message", "main1", "arg1", "main1", "arg2")
+	expectedInfo := `{"time":"2023-09-29T13:00:59Z","level":"INFO","msg":"main message","with1":"arg1","with1":"arg2","with2":"arg1","with2":"arg2","group1":{"with4":"arg1","with4":"arg2","with5":"arg1","with5":"arg2","main1":"arg1","main1":"arg2"}}
+`
+	if buf.String() != expectedInfo {
+		t.Errorf("Expected:\n%s\nGot:\n%s\n", expectedInfo, buf.String())
+	}
+
+	// Test with wrappers
+	buf.Reset()
+	Debug(ctx, "main message", "main1", "arg1", "main1", "arg2")
+	expectedDebug := `{"time":"2023-09-29T13:00:59Z","level":"DEBUG","msg":"main message","with1":"arg1","with1":"arg2","with2":"arg1","with2":"arg2","group1":{"with4":"arg1","with4":"arg2","with5":"arg1","with5":"arg2","main1":"arg1","main1":"arg2"}}
+`
+	if buf.String() != expectedDebug {
+		t.Errorf("Expected:\n%s\nGot:\n%s\n", expectedDebug, buf.String())
+	}
+
+	buf.Reset()
+	Info(ctx, "main message", "main1", "arg1", "main1", "arg2")
+	if buf.String() != expectedInfo {
+		t.Errorf("Expected:\n%s\nGot:\n%s\n", expectedInfo, buf.String())
+	}
+
+	buf.Reset()
+	Warn(ctx, "main message", "main1", "arg1", "main1", "arg2")
+	expectedWarn := `{"time":"2023-09-29T13:00:59Z","level":"WARN","msg":"main message","with1":"arg1","with1":"arg2","with2":"arg1","with2":"arg2","group1":{"with4":"arg1","with4":"arg2","with5":"arg1","with5":"arg2","main1":"arg1","main1":"arg2"}}
+`
+	if buf.String() != expectedWarn {
+		t.Errorf("Expected:\n%s\nGot:\n%s\n", expectedWarn, buf.String())
+	}
+
+	buf.Reset()
+	Error(ctx, "main message", "main1", "arg1", "main1", "arg2")
+	expectedError := `{"time":"2023-09-29T13:00:59Z","level":"ERROR","msg":"main message","with1":"arg1","with1":"arg2","with2":"arg1","with2":"arg2","group1":{"with4":"arg1","with4":"arg2","with5":"arg1","with5":"arg2","main1":"arg1","main1":"arg2"}}
+`
+	if buf.String() != expectedError {
+		t.Errorf("Expected:\n%s\nGot:\n%s\n", expectedError, buf.String())
+	}
+
+	buf.Reset()
+	Log(ctx, slog.LevelWarn, "main message", "main1", "arg1", "main1", "arg2")
+	if buf.String() != expectedWarn {
+		t.Errorf("Expected:\n%s\nGot:\n%s\n", expectedWarn, buf.String())
+	}
+
+	buf.Reset()
+	LogAttrs(ctx, slog.LevelInfo, "main message", slog.String("main1", "arg1"), slog.String("main1", "arg2"))
+	if buf.String() != expectedInfo {
+		t.Errorf("Expected:\n%s\nGot:\n%s\n", expectedInfo, buf.String())
+	}
+}
diff --git a/handler_test.go b/handler_test.go
index 26ccf78..dc3a8b8 100644
--- a/handler_test.go
+++ b/handler_test.go
@@ -15,24 +15,33 @@ func TestHandler(t *testing.T) {
 	ctx := context.Background()
 	ctx = Prepend(ctx, "prepend1", "arg1", "prepend1", "arg2")
 	ctx = Prepend(ctx, "prepend2", "arg1", "prepend2", "arg2")
+	Prepend(ctx, "prepend3", "arg1", "prepend3", "arg2") // Ensure we aren't overwriting the parent context
 	ctx = Append(ctx, "append1", "arg1", "append1", "arg2")
 	ctx = Append(ctx, "append2", "arg1", "append2", "arg2")
+	Append(ctx, "append3", "arg1", "append3", "arg2") // Ensure we aren't overwriting the parent context
 
-	log := slog.New(h)
+	l := slog.New(h)
 
-	log = log.With("with1", "arg1", "with1", "arg2")
-	log = log.WithGroup("group1")
-	log = log.With("with2", "arg1", "with2", "arg2")
+	l = l.With("with1", "arg1", "with1", "arg2")
+	l = l.WithGroup("group1")
+	l = l.With("with2", "arg1", "with2", "arg2")
 
-	log.InfoContext(ctx, "main message", "main1", "arg1", "main1", "arg2")
+	l.InfoContext(ctx, "main message", "main1", "arg1", "main1", "arg2")
 
-	t.Log(tester.String())
-	// time=2023-09-29T13:00:59.000Z level=INFO msg="main message" prepend1=arg1 prepend1=arg2 prepend2=arg1 prepend2=arg2 with1=arg1 with1=arg2 group1.with2=arg1 group1.with2=arg2 group1.main1=arg1 group1.main1=arg2 group1.append1=arg1 group1.append1=arg2 group1.append2=arg1 group1.append2=arg2
+	expectedText := `time=2023-09-29T13:00:59.000Z level=INFO msg="main message" prepend1=arg1 prepend1=arg2 prepend2=arg1 prepend2=arg2 with1=arg1 with1=arg2 group1.with2=arg1 group1.with2=arg2 group1.main1=arg1 group1.main1=arg2 group1.append1=arg1 group1.append1=arg2 group1.append2=arg1 group1.append2=arg2
+`
+	if s := tester.String(); s != expectedText {
+		t.Errorf("Expected:\n%s\nGot:\n%s\n", expectedText, s)
+	}
 
 	b, err := tester.MarshalJSON()
 	if err != nil {
 		t.Fatal(err)
 	}
-	t.Log(string(b))
-	// {"time":"2023-09-29T13:00:59Z","level":"INFO","msg":"main message","prepend1":"arg1","prepend1":"arg2","prepend2":"arg1","prepend2":"arg2","with1":"arg1","with1":"arg2","group1":{"with2":"arg1","with2":"arg2","main1":"arg1","main1":"arg2","append1":"arg1","append1":"arg2","append2":"arg1","append2":"arg2"}}
+
+	expectedJSON := `{"time":"2023-09-29T13:00:59Z","level":"INFO","msg":"main message","prepend1":"arg1","prepend1":"arg2","prepend2":"arg1","prepend2":"arg2","with1":"arg1","with1":"arg2","group1":{"with2":"arg1","with2":"arg2","main1":"arg1","main1":"arg2","append1":"arg1","append1":"arg2","append2":"arg1","append2":"arg2"}}
+`
+	if string(b) != expectedJSON {
+		t.Errorf("Expected:\n%s\nGot:\n%s\n", expectedText, string(b))
+	}
 }
diff --git a/helpers_test.go b/helpers_test.go
index 5ebfdad..28b6a05 100644
--- a/helpers_test.go
+++ b/helpers_test.go
@@ -7,6 +7,8 @@ import (
 	"time"
 )
 
+var defaultTime = time.Date(2023, 9, 29, 13, 0, 59, 0, time.UTC)
+
 type testHandler struct {
 	Ctx    context.Context
 	Record slog.Record
@@ -19,7 +21,7 @@ func (h *testHandler) Enabled(context.Context, slog.Level) bool {
 func (h *testHandler) Handle(ctx context.Context, r slog.Record) error {
 	h.Ctx = ctx
 	h.Record = r
-	h.Record.Time = time.Date(2023, 9, 29, 13, 0, 59, 0, time.UTC)
+	h.Record.Time = defaultTime
 	return nil
 }