3 files changed, 30 insertions, 0 deletions
diff --git a/src/testing/synctest/helper_test.go b/src/testing/synctest/helper_test.go
new file mode 100644
index 0000000000..7547d3eac6
--- /dev/null
+++ b/src/testing/synctest/helper_test.go
@@ -0,0 +1,15 @@
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package synctest_test
+
+import "testing"
+
+// helperLog is a t.Helper which logs.
+// Since it is a helper, the log prefix should contain
+// the caller's file, not helper_test.go.
+func helperLog(t *testing.T, s string) {
+	t.Helper()
+	t.Log(s)
+}
diff --git a/src/testing/synctest/synctest_test.go b/src/testing/synctest/synctest_test.go
index 822fd6fe1c..9c73178750 100644
--- a/src/testing/synctest/synctest_test.go
+++ b/src/testing/synctest/synctest_test.go
@@ -140,6 +140,18 @@ func TestRun(t *testing.T) {
 	})
 }
 
+func TestHelper(t *testing.T) {
+	runTest(t, []string{"-test.v"}, func() {
+		synctest.Test(t, func(t *testing.T) {
+			helperLog(t, "log in helper")
+		})
+	}, `^=== RUN   TestHelper
+    synctest_test.go:.* log in helper
+--- PASS: TestHelper.*
+PASS
+$`)
+}
+
 func wantPanic(t *testing.T, want string) {
 	if e := recover(); e != nil {
 		if got := fmt.Sprint(e); got != want {
diff --git a/src/testing/testing.go b/src/testing/testing.go
index b2d4c0c938..3475bfca4a 100644
--- a/src/testing/testing.go
+++ b/src/testing/testing.go
@@ -1261,6 +1261,9 @@ func (c *common) Skipped() bool {
 // When printing file and line information, that function will be skipped.
 // Helper may be called simultaneously from multiple goroutines.
 func (c *common) Helper() {
+	if c.isSynctest {
+		c = c.parent
+	}
 	c.mu.Lock()
 	defer c.mu.Unlock()
 	if c.helperPCs == nil {