diff --git a/cmd/coordinator/builders_test.go b/cmd/coordinator/builders_test.go
index c97eb414..8aff1b1c 100644
--- a/cmd/coordinator/builders_test.go
+++ b/cmd/coordinator/builders_test.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build linux
+
 package main
 
 import (
diff --git a/cmd/coordinator/reverse_test.go b/cmd/coordinator/reverse_test.go
index b54aab08..1c8c0f3b 100644
--- a/cmd/coordinator/reverse_test.go
+++ b/cmd/coordinator/reverse_test.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build linux
 // +build BROKEN
 
 // I get:
diff --git a/cmd/coordinator/trybot_dev.go b/cmd/coordinator/trybot_dev.go
index 4045bb70..b21ffa76 100644
--- a/cmd/coordinator/trybot_dev.go
+++ b/cmd/coordinator/trybot_dev.go
@@ -7,6 +7,7 @@
 // Compile it into the binary by running go install -tags=dev, then load the
 // dummy data at /try-dev in your browser.
 
+// +build linux
 // +build dev
 
 package main