diff --git a/internal/api/main_test.go b/internal/api/main_test.go
new file mode 100644
index 0000000..ea563a4
--- /dev/null
+++ b/internal/api/main_test.go
@@ -0,0 +1,15 @@
+package api
+
+import (
+	"os"
+	"testing"
+)
+
+// TestMain points the premium-name lookup at an address nothing listens on before any test
+// runs. A test that forgets stubMojangNames then fails the same way everywhere (lookup
+// error, fail closed, rename) instead of asking the real api.mojang.com, whose answer
+// changes the day someone buys the name and which CI may not reach at all.
+func TestMain(m *testing.M) {
+	mojangProfileAPI = "http://127.0.0.1:1/"
+	os.Exit(m.Run())
+}