diff --git a/src/librustdoc/test.rs b/src/librustdoc/test.rs
index c242eea2362..26f331ac7d1 100644
--- a/src/librustdoc/test.rs
+++ b/src/librustdoc/test.rs
@@ -67,6 +67,7 @@ pub fn run(input: &str,
         crate_types: vec![config::CrateTypeDylib],
         externs: externs.clone(),
         unstable_features: UnstableFeatures::from_environment(),
+        actually_rustdoc: true,
         ..config::basic_options().clone()
     };