diff --git a/daemon/daemon_unix.go b/daemon/daemon_unix.go
index c0dd588e76..561837e2f5 100644
--- a/daemon/daemon_unix.go
+++ b/daemon/daemon_unix.go
@@ -1043,18 +1043,6 @@ func getDefaultBridgeName(cfg config.BridgeConfig) (bridgeName string, userManag
 		// create it, and it is not possible to supply an address using --bip.
 		return cfg.Iface, true
 	}
-	// Without a --bridge, the bridge is "docker0", created and managed by the
-	// daemon. A --bip (cidr) can be supplied to define the bridge's IP address
-	// and the network's subnet.
-	//
-	// Env var DOCKER_TEST_CREATE_DEFAULT_BRIDGE env var modifies the default
-	// bridge name. Unlike '--bridge', the bridge does not need to be created
-	// outside the daemon, and it's still possible to use '--bip'. It is
-	// intended only for use in moby tests; it may be removed, its behaviour
-	// may be modified, and it may not do what you want anyway!
-	if bn := os.Getenv("DOCKER_TEST_CREATE_DEFAULT_BRIDGE"); bn != "" {
-		return bn, false
-	}
 	return bridge.DefaultBridgeName, false
 }
 
diff --git a/libnetwork/drivers/bridge/setup_device_linux.go b/libnetwork/drivers/bridge/setup_device_linux.go
index 374c6b7b6f..006a2aa751 100644
--- a/libnetwork/drivers/bridge/setup_device_linux.go
+++ b/libnetwork/drivers/bridge/setup_device_linux.go
@@ -15,15 +15,7 @@ import (
 
 // SetupDevice create a new bridge interface/
 func setupDevice(config *networkConfiguration, i *bridgeInterface) error {
-	// We only attempt to create the bridge when the requested device name is
-	// the default one. The default bridge name can be overridden with the
-	// DOCKER_TEST_CREATE_DEFAULT_BRIDGE env var. It should be used only for
-	// test purpose.
-	var defaultBridgeName string
-	if defaultBridgeName = os.Getenv("DOCKER_TEST_CREATE_DEFAULT_BRIDGE"); defaultBridgeName == "" {
-		defaultBridgeName = DefaultBridgeName
-	}
-	if config.BridgeName != defaultBridgeName && config.DefaultBridge {
+	if config.BridgeName != DefaultBridgeName && config.DefaultBridge {
 		return NonDefaultBridgeExistError(config.BridgeName)
 	}