diff --git a/export_test.go b/export_test.go
index 97b6179a4..c1b77683f 100644
--- a/export_test.go
+++ b/export_test.go
@@ -106,7 +106,3 @@ func (c *ModuleLoadexConfig) ToArgs() []interface{} {
 func ShouldRetry(err error, retryTimeout bool) bool {
 	return shouldRetry(err, retryTimeout)
 }
-
-func JoinErrors(errs []error) string {
-	return joinErrors(errs)
-}
diff --git a/sentinel.go b/sentinel.go
index 663f7b1ad..73428b982 100644
--- a/sentinel.go
+++ b/sentinel.go
@@ -16,7 +16,6 @@ import (
 	"github.com/redis/go-redis/v9/internal"
 	"github.com/redis/go-redis/v9/internal/pool"
 	"github.com/redis/go-redis/v9/internal/rand"
-	"github.com/redis/go-redis/v9/internal/util"
 	"github.com/redis/go-redis/v9/maintnotifications"
 	"github.com/redis/go-redis/v9/push"
 )
@@ -904,22 +903,7 @@ func (c *sentinelFailover) MasterAddr(ctx context.Context) (string, error) {
 	for err := range errCh {
 		errs = append(errs, err)
 	}
-	return "", fmt.Errorf("redis: all sentinels specified in configuration are unreachable: %s", joinErrors(errs))
-}
-
-func joinErrors(errs []error) string {
-	if len(errs) == 0 {
-		return ""
-	}
-	if len(errs) == 1 {
-		return errs[0].Error()
-	}
-	b := []byte(errs[0].Error())
-	for _, err := range errs[1:] {
-		b = append(b, '\n')
-		b = append(b, err.Error()...)
-	}
-	return util.BytesToString(b)
+	return "", fmt.Errorf("redis: all sentinels specified in configuration are unreachable: %w", errors.Join(errs...))
 }
 
 func (c *sentinelFailover) replicaAddrs(ctx context.Context, useDisconnected bool) ([]string, error) {
diff --git a/sentinel_test.go b/sentinel_test.go
index 0f0f61ebf..f332822f5 100644
--- a/sentinel_test.go
+++ b/sentinel_test.go
@@ -682,99 +682,3 @@ func compareSlices(t *testing.T, a, b []string, name string) {
 		}
 	}
 }
-
-type joinErrorsTest struct {
-	name     string
-	errs     []error
-	expected string
-}
-
-func TestJoinErrors(t *testing.T) {
-	tests := []joinErrorsTest{
-		{
-			name:     "empty slice",
-			errs:     []error{},
-			expected: "",
-		},
-		{
-			name:     "single error",
-			errs:     []error{errors.New("first error")},
-			expected: "first error",
-		},
-		{
-			name:     "two errors",
-			errs:     []error{errors.New("first error"), errors.New("second error")},
-			expected: "first error\nsecond error",
-		},
-		{
-			name: "multiple errors",
-			errs: []error{
-				errors.New("first error"),
-				errors.New("second error"),
-				errors.New("third error"),
-			},
-			expected: "first error\nsecond error\nthird error",
-		},
-		{
-			name:     "nil slice",
-			errs:     nil,
-			expected: "",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			result := redis.JoinErrors(tt.errs)
-			if result != tt.expected {
-				t.Errorf("joinErrors() = %q, want %q", result, tt.expected)
-			}
-		})
-	}
-}
-
-func BenchmarkJoinErrors(b *testing.B) {
-	benchmarks := []joinErrorsTest{
-		{
-			name:     "empty slice",
-			errs:     []error{},
-			expected: "",
-		},
-		{
-			name:     "single error",
-			errs:     []error{errors.New("first error")},
-			expected: "first error",
-		},
-		{
-			name:     "two errors",
-			errs:     []error{errors.New("first error"), errors.New("second error")},
-			expected: "first error\nsecond error",
-		},
-		{
-			name: "multiple errors",
-			errs: []error{
-				errors.New("first error"),
-				errors.New("second error"),
-				errors.New("third error"),
-			},
-			expected: "first error\nsecond error\nthird error",
-		},
-		{
-			name:     "nil slice",
-			errs:     nil,
-			expected: "",
-		},
-	}
-	for _, bm := range benchmarks {
-		b.Run(bm.name, func(b *testing.B) {
-			b.ResetTimer()
-			b.RunParallel(func(pb *testing.PB) {
-				for pb.Next() {
-					result := redis.JoinErrors(bm.errs)
-					if result != bm.expected {
-						b.Errorf("joinErrors() = %q, want %q", result, bm.expected)
-					}
-				}
-			})
-		})
-	}
-}