==== tests/cases/conformance/externalModules/foo_1.ts (1 errors) ====
    import foo = require("vs/foo");
                         ~~~~~~~~
!!! Cannot find external module 'vs/foo'.
    var z = foo.x + 10;
    
==== tests/cases/conformance/externalModules/vs/foo_0.ts (0 errors) ====
    export var x: number;