diff --git a/server/server_test.go b/server/server_test.go
index f9f63581a..df9a09fc0 100644
--- a/server/server_test.go
+++ b/server/server_test.go
@@ -594,6 +594,7 @@ func NewMain() *Main {
 // MustRunMain returns a new, running Main. Panic on error.
 func MustRunMain() *Main {
 	m := NewMain()
+	m.Config.Metric.Diagnostics = false // Disable diagnostics.
 	if err := m.Run(); err != nil {
 		panic(err)
 	}