diff --git a/.travis.yml b/.travis.yml
index a8fe369b5fb..f312c803a90 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,7 @@ install:
   # Required for Racer autoconfiguration
   - rustup component add rust-src
   - rustup component add rust-analysis
+  - rustup component add rustc-dev
 matrix:
   fast_finish: true
   include:
diff --git a/ci/azure-test.yml b/ci/azure-test.yml
index 4e81f170bb6..f651278a125 100644
--- a/ci/azure-test.yml
+++ b/ci/azure-test.yml
@@ -17,7 +17,7 @@ jobs:
       parameters:
         rust_version: ${{ parameters.rust }}
     - script: |
-        rustup component add rust-src rust-analysis
+        rustup component add rust-src rust-analysis rustc-dev
       displayName: Install distributed Rust source code for Racer autocompletion
     - ${{ each crate in parameters.crates }}:
       - script: cargo test -v