diff --git a/.appveyor.yml b/.appveyor.yml
index 0f1488a04..dcee442cd 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -29,7 +29,7 @@ test_script:
   # Try just a few features for `web-sys`, unfortunately the whole crate blows
   # system command line limits meaning we can't even spawn rustc to enable all
   # the features.
-  - cargo build --manifest-path crates/web-sys/Cargo.toml --target wasm32-unknown-unknown --features 'Node Window Document'
+  - cargo build --manifest-path crates/web-sys/Cargo.toml --target wasm32-unknown-unknown --features "Node Window Document"
 
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