diff --git a/.travis.yml b/.travis.yml
index 1cb2e68cbb8..8c1c5ea5371 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,6 +18,7 @@ matrix:
         - cargo doc --no-deps --features nightly
 script:
   - cargo test
+  - cargo test --features serde-1
   - cargo test --manifest-path rand-derive/Cargo.toml
 after_success:
   - travis-cargo --only nightly doc-upload
diff --git a/appveyor.yml b/appveyor.yml
index 39c6a180be8..9d970669609 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -33,5 +33,6 @@ build: false
 
 test_script:
   - cargo test
+  - cargo test --features serde-1
   - cargo test --features nightly
   - cargo test --manifest-path rand-derive/Cargo.toml