diff --git a/cmd/evm/internal/t8ntool/transaction.go b/cmd/evm/internal/t8ntool/transaction.go
index 1d43cd4846..a71af5141d 100644
--- a/cmd/evm/internal/t8ntool/transaction.go
+++ b/cmd/evm/internal/t8ntool/transaction.go
@@ -24,7 +24,6 @@ import (
 	"os"
 	"strings"
 
-	"golang.org/x/exp/slog"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/core"
@@ -34,6 +33,7 @@ import (
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/tests"
 	"github.com/urfave/cli/v2"
+	"golang.org/x/exp/slog"
 )
 
 type result struct {
diff --git a/cmd/faucet/faucet.go b/cmd/faucet/faucet.go
index f9e3ad06d7..a8d570c61e 100644
--- a/cmd/faucet/faucet.go
+++ b/cmd/faucet/faucet.go
@@ -39,7 +39,6 @@ import (
 	"sync"
 	"time"
 
-	"golang.org/x/exp/slog"
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/cmd/utils"
@@ -59,6 +58,7 @@ import (
 	"github.com/ethereum/go-ethereum/p2p/nat"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/gorilla/websocket"
+	"golang.org/x/exp/slog"
 )
 
 var (
diff --git a/cmd/geth/logtestcmd_active.go b/cmd/geth/logtestcmd_active.go
index 0632f9ca4b..4addec0ac7 100644
--- a/cmd/geth/logtestcmd_active.go
+++ b/cmd/geth/logtestcmd_active.go
@@ -49,7 +49,6 @@ func (c customQuotedStringer) String() string {
 // logTest is an entry point which spits out some logs. This is used by testing
 // to verify expected outputs
 func logTest(ctx *cli.Context) error {
-	log.ResetGlobalState()
 	{ // big.Int
 		ba, _ := new(big.Int).SetString("111222333444555678999", 10)    // "111,222,333,444,555,678,999"
 		bb, _ := new(big.Int).SetString("-111222333444555678999", 10)   // "-111,222,333,444,555,678,999"
diff --git a/internal/debug/flags.go b/internal/debug/flags.go
index cc507685ad..796821160e 100644
--- a/internal/debug/flags.go
+++ b/internal/debug/flags.go
@@ -34,8 +34,8 @@ import (
 	"github.com/mattn/go-colorable"
 	"github.com/mattn/go-isatty"
 	"github.com/urfave/cli/v2"
-	"gopkg.in/natefinch/lumberjack.v2"
 	"golang.org/x/exp/slog"
+	"gopkg.in/natefinch/lumberjack.v2"
 )
 
 var Memsize memsizeui.Handler
diff --git a/internal/testlog/testlog.go b/internal/testlog/testlog.go
index 9bc6f4f579..a3b7d0721b 100644
--- a/internal/testlog/testlog.go
+++ b/internal/testlog/testlog.go
@@ -18,154 +18,24 @@
 package testlog
 
 import (
-	"context"
-	"sync"
 	"testing"
 
 	"github.com/ethereum/go-ethereum/log"
 	"golang.org/x/exp/slog"
 )
 
-// logger implements log.Logger such that all output goes to the unit test log via
-// t.Logf(). All methods in between logger.Trace, logger.Debug, etc. are marked as test
-// helpers, so the file and line number in unit test output correspond to the call site
-// which emitted the log message.
-type logger struct {
-	t  *testing.T
-	l  log.Logger
-	mu *sync.Mutex
-	h  *bufHandler
+type relay struct {
+	t *testing.T
 }
 
-type bufHandler struct {
-	buf   []slog.Record
-	attrs []slog.Attr
-	level slog.Level
-}
-
-func (h *bufHandler) Handle(_ context.Context, r slog.Record) error {
-	h.buf = append(h.buf, r)
-	return nil
-}
-
-func (h *bufHandler) Enabled(_ context.Context, lvl slog.Level) bool {
-	return lvl <= h.level
-}
-
-// TODO: does testlogger make use of attrs?
-func (h *bufHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
-	records := make([]slog.Record, len(h.buf))
-	copy(records[:], h.buf[:])
-	return &bufHandler{
-		records,
-		append(h.attrs, attrs...),
-		h.level,
-	}
-}
-
-func (h *bufHandler) WithGroup(_ string) slog.Handler {
-	panic("not implemented")
+func (r *relay) Write(p []byte) (n int, err error) {
+	r.t.Logf(string(p))
+	return len(p), nil
 }
 
 // Logger returns a logger which logs to the unit test log of t.
 func Logger(t *testing.T, level slog.Level) log.Logger {
-	handler := bufHandler{
-		[]slog.Record{},
-		[]slog.Attr{},
-		level,
-	}
-	return &logger{
-		t:  t,
-		l:  log.NewLogger(&handler),
-		mu: new(sync.Mutex),
-		h:  &handler,
-	}
-}
-
-// LoggerWithHandler returns
-func LoggerWithHandler(t *testing.T, handler slog.Handler) log.Logger {
-	var bh bufHandler
-	return &logger{
-		t:  t,
-		l:  log.NewLogger(handler),
-		mu: new(sync.Mutex),
-		h:  &bh,
-	}
-}
-
-func (l *logger) Handler() slog.Handler {
-	return l.l.Handler()
-}
-
-func (l *logger) Trace(msg string, ctx ...interface{}) {
-	l.t.Helper()
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	l.l.Trace(msg, ctx...)
-	l.flush()
-}
-
-func (l *logger) Log(level slog.Level, msg string, ctx ...interface{}) {
-	l.t.Helper()
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	l.l.Log(level, msg, ctx...)
-	l.flush()
-}
-
-func (l *logger) Debug(msg string, ctx ...interface{}) {
-	l.t.Helper()
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	l.l.Debug(msg, ctx...)
-	l.flush()
-}
-
-func (l *logger) Info(msg string, ctx ...interface{}) {
-	l.t.Helper()
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	l.l.Info(msg, ctx...)
-	l.flush()
-}
-
-func (l *logger) Warn(msg string, ctx ...interface{}) {
-	l.t.Helper()
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	l.l.Warn(msg, ctx...)
-	l.flush()
-}
-
-func (l *logger) Error(msg string, ctx ...interface{}) {
-	l.t.Helper()
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	l.l.Error(msg, ctx...)
-	l.flush()
-}
-
-func (l *logger) Crit(msg string, ctx ...interface{}) {
-	l.t.Helper()
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	l.l.Crit(msg, ctx...)
-	l.flush()
-}
-
-func (l *logger) With(ctx ...interface{}) log.Logger {
-	return &logger{l.t, l.l.With(ctx...), l.mu, l.h}
-}
-
-func (l *logger) New(ctx ...interface{}) log.Logger {
-	return l.With(ctx...)
-}
-
-// flush writes all buffered messages and clears the buffer.
-func (l *logger) flush() {
-	l.t.Helper()
-	for _, r := range l.h.buf {
-		l.t.Logf("%s", log.TerminalFormat(r, false))
-	}
-	l.h.buf = nil
+	r := relay{t}
+	handler := log.TerminalHandlerWithLevel(&r, level, false)
+	return log.NewLogger(handler)
 }
diff --git a/log/format.go b/log/format.go
index 057bbc32c1..a98c95847a 100644
--- a/log/format.go
+++ b/log/format.go
@@ -6,7 +6,6 @@ import (
 	"math/big"
 	"reflect"
 	"strconv"
-	"sync"
 	"time"
 	"unicode/utf8"
 
@@ -14,10 +13,6 @@ import (
 	"golang.org/x/exp/slog"
 )
 
-const timeKey = "t"
-const lvlKey = "lvl"
-const msgKey = "msg"
-
 const (
 	timeFormat        = "2006-01-02T15:04:05-0700"
 	termTimeFormat    = "01-02|15:04:05.000"
@@ -26,21 +21,6 @@ const (
 	termCtxMaxPadding = 40
 )
 
-// ResetGlobalState resets the fieldPadding, which is useful for producing
-// predictable output.
-func ResetGlobalState() {
-	fieldPaddingLock.Lock()
-	fieldPadding = make(map[string]int)
-	fieldPaddingLock.Unlock()
-}
-
-// fieldPadding is a global map with maximum field value lengths seen until now
-// to allow padding log contexts in a bit smarter way.
-var fieldPadding = make(map[string]int)
-
-// fieldPaddingLock is a global mutex protecting the field padding map.
-var fieldPaddingLock sync.RWMutex
-
 type Format interface {
 	Format(r slog.Record) []byte
 }
@@ -64,16 +44,7 @@ type TerminalStringer interface {
 	TerminalString() string
 }
 
-// TerminalFormat formats log records optimized for human readability on
-// a terminal with color-coded level output and terser human friendly timestamp.
-// This format should only be used for interactive programs or while developing.
-//
-//	[LEVEL] [TIME] MESSAGE key=value key=value ...
-//
-// Example:
-//
-//	[DBUG] [May 16 20:58:45] remove route ns=haproxy addr=127.0.0.1:50002
-func TerminalFormat(r slog.Record, commonAttrs []slog.Attr, usecolor bool) []byte {
+func (h *terminalHandler) TerminalFormat(r slog.Record, usecolor bool) []byte {
 	msg := escapeMessage(r.Message)
 	var color = 0
 	if usecolor {
@@ -106,18 +77,19 @@ func TerminalFormat(r slog.Record, commonAttrs []slog.Attr, usecolor bool) []byt
 		b.Write(bytes.Repeat([]byte{' '}, termMsgJust-length))
 	}
 	// print the keys logfmt style
-	logfmt(b, commonAttrs, r, color, true)
+	h.logfmt(b, r, color)
+
 	return b.Bytes()
 }
 
-func logfmt(buf *bytes.Buffer, commonAttrs []slog.Attr, r slog.Record, color int, term bool) {
+func (h *terminalHandler) logfmt(buf *bytes.Buffer, r slog.Record, color int) {
 	attrs := []slog.Attr{}
 	r.Attrs(func(attr slog.Attr) bool {
 		attrs = append(attrs, attr)
 		return true
 	})
 
-	attrs = append(commonAttrs, attrs...)
+	attrs = append(h.attrs, attrs...)
 
 	for i, attr := range attrs {
 		if i != 0 {
@@ -130,17 +102,12 @@ func logfmt(buf *bytes.Buffer, commonAttrs []slog.Attr, r slog.Record, color int
 
 		// XXX: we should probably check that all of your key bytes aren't invalid
 		// TODO (jwasinger) above comment was from log15 code.  what does it mean?  check that key bytes are ascii characters?
-		fieldPaddingLock.RLock()
-		padding := fieldPadding[key]
-		fieldPaddingLock.RUnlock()
+		padding := h.fieldPadding[key]
 
 		length := utf8.RuneCountInString(val)
 		if padding < length && length <= termCtxMaxPadding {
 			padding = length
-
-			fieldPaddingLock.Lock()
-			fieldPadding[key] = padding
-			fieldPaddingLock.Unlock()
+			h.fieldPadding[key] = padding
 		}
 		if color > 0 {
 			fmt.Fprintf(buf, "\x1b[%dm%s\x1b[0m=", color, key)
diff --git a/log/handler.go b/log/handler.go
index 4922366e43..68fd90fe8b 100644
--- a/log/handler.go
+++ b/log/handler.go
@@ -110,6 +110,9 @@ type terminalHandler struct {
 	lvl      slog.Level
 	useColor bool
 	attrs    []slog.Attr
+	// fieldPadding is a map with maximum field value lengths seen until now
+	// to allow padding log contexts in a bit smarter way.
+	fieldPadding map[string]int
 }
 
 // TerminalHandler returns a handler which formats log records at all levels optimized for human readability on
@@ -134,13 +137,14 @@ func TerminalHandlerWithLevel(wr io.Writer, lvl slog.Level, useColor bool) slog.
 		lvl,
 		useColor,
 		[]slog.Attr{},
+		make(map[string]int),
 	}
 }
 
 func (h *terminalHandler) Handle(_ context.Context, r slog.Record) error {
 	h.mu.Lock()
 	defer h.mu.Unlock()
-	h.wr.Write(TerminalFormat(r, h.attrs, h.useColor))
+	h.wr.Write(h.TerminalFormat(r, h.useColor))
 	return nil
 }
 
@@ -159,6 +163,7 @@ func (h *terminalHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
 		h.lvl,
 		h.useColor,
 		append(h.attrs, attrs...),
+		make(map[string]int),
 	}
 }
 
diff --git a/log/logger_test.go b/log/logger_test.go
index 1b50e96110..bdf4a51eb4 100644
--- a/log/logger_test.go
+++ b/log/logger_test.go
@@ -5,6 +5,7 @@ import (
 	"os"
 	"strings"
 	"testing"
+
 	"golang.org/x/exp/slog"
 )
 
diff --git a/p2p/discover/v4_udp_test.go b/p2p/discover/v4_udp_test.go
index 48bc014ee8..53ecb1bc6e 100644
--- a/p2p/discover/v4_udp_test.go
+++ b/p2p/discover/v4_udp_test.go
@@ -18,7 +18,6 @@ package discover
 
 import (
 	"bytes"
-	"context"
 	"crypto/ecdsa"
 	crand "crypto/rand"
 	"encoding/binary"
@@ -32,8 +31,6 @@ import (
 	"testing"
 	"time"
 
-	"golang.org/x/exp/slog"
-
 	"github.com/ethereum/go-ethereum/internal/testlog"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/p2p/discover/v4wire"
@@ -560,14 +557,7 @@ func startLocalhostV4(t *testing.T, cfg Config) *UDPv4 {
 
 	// Prefix logs with node ID.
 	lprefix := fmt.Sprintf("(%s)", ln.ID().TerminalString())
-	cfg.Log = testlog.LoggerWithHandler(t, log.FuncHandler(func(_ context.Context, r slog.Record) error {
-		if r.Level <= log.LevelTrace {
-			return nil
-		}
-
-		t.Logf("%s %s", lprefix, log.TerminalFormat(r, false))
-		return nil
-	}))
+	cfg.Log = testlog.Logger(t, log.LevelTrace).With("node-id", lprefix)
 
 	// Listen.
 	socket, err := net.ListenUDP("udp4", &net.UDPAddr{IP: net.IP{127, 0, 0, 1}})
diff --git a/p2p/discover/v5_udp_test.go b/p2p/discover/v5_udp_test.go
index 8b6b6643ce..18d8aeac6d 100644
--- a/p2p/discover/v5_udp_test.go
+++ b/p2p/discover/v5_udp_test.go
@@ -18,7 +18,6 @@ package discover
 
 import (
 	"bytes"
-	"context"
 	"crypto/ecdsa"
 	"encoding/binary"
 	"fmt"
@@ -28,8 +27,6 @@ import (
 	"testing"
 	"time"
 
-	"golang.org/x/exp/slog"
-
 	"github.com/ethereum/go-ethereum/internal/testlog"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/p2p/discover/v5wire"
@@ -82,13 +79,7 @@ func startLocalhostV5(t *testing.T, cfg Config) *UDPv5 {
 
 	// Prefix logs with node ID.
 	lprefix := fmt.Sprintf("(%s)", ln.ID().TerminalString())
-	cfg.Log = testlog.LoggerWithHandler(t, log.FuncHandler(func(_ context.Context, r slog.Record) error {
-		if r.Level <= log.LevelTrace {
-			return nil
-		}
-		t.Logf("%s %s", lprefix, log.TerminalFormat(r, false))
-		return nil
-	}))
+	cfg.Log = testlog.Logger(t, log.LevelTrace).With("node-id", lprefix)
 
 	// Listen.
 	socket, err := net.ListenUDP("udp4", &net.UDPAddr{IP: net.IP{127, 0, 0, 1}})
diff --git a/signer/core/auditlog.go b/signer/core/auditlog.go
index 324f097033..d2207c9eb8 100644
--- a/signer/core/auditlog.go
+++ b/signer/core/auditlog.go
@@ -21,12 +21,12 @@ import (
 	"encoding/json"
 	"os"
 
-	"golang.org/x/exp/slog"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/internal/ethapi"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/signer/core/apitypes"
+	"golang.org/x/exp/slog"
 )
 
 type AuditLogger struct {
diff --git a/signer/storage/aes_gcm_storage_test.go b/signer/storage/aes_gcm_storage_test.go
index 9b3a17fce6..eb32a0a2a8 100644
--- a/signer/storage/aes_gcm_storage_test.go
+++ b/signer/storage/aes_gcm_storage_test.go
@@ -23,10 +23,10 @@ import (
 	"os"
 	"testing"
 
-	"golang.org/x/exp/slog"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/mattn/go-colorable"
+	"golang.org/x/exp/slog"
 )
 
 func TestEncryption(t *testing.T) {