diff --git a/cmd/coordinator/buildstatus.go b/cmd/coordinator/buildstatus.go
index 89ed7fd..cc3facb 100644
--- a/cmd/coordinator/buildstatus.go
+++ b/cmd/coordinator/buildstatus.go
@@ -1084,6 +1084,10 @@
 	if st.conf.IsRace() {
 		args = append(args, "-race")
 	}
+	if scale := st.conf.GoTestTimeoutScale(); scale != 1 {
+		const goTestDefaultTimeout = 10 * time.Minute // Default value taken from Go 1.20.
+		args = append(args, "-timeout="+(goTestDefaultTimeout*time.Duration(scale)).String())
+	}
 
 	var remoteErrors []error
 	for _, tr := range testRuns {
diff --git a/dashboard/builders.go b/dashboard/builders.go
index 43fb32a..04a1157 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -963,12 +963,12 @@
 	// up into separate dist tests or shards, like the test/ dir
 	// was)
 	d := 20 * time.Minute
-	d *= time.Duration(c.timeoutScale())
+	d *= time.Duration(c.GoTestTimeoutScale())
 	return d
 }
 
-// timeoutScale returns this builder's GO_TEST_TIMEOUT_SCALE value, or 1.
-func (c *BuildConfig) timeoutScale() int {
+// GoTestTimeoutScale returns this builder's GO_TEST_TIMEOUT_SCALE value, or 1.
+func (c *BuildConfig) GoTestTimeoutScale() int {
 	const pfx = "GO_TEST_TIMEOUT_SCALE="
 	for _, env := range [][]string{c.env, c.HostConfig().env} {
 		for _, kv := range env {