diff --git a/ci/test-nightly.sh b/ci/test-nightly.sh
index 022d7f4c4b..d56a691ebc 100755
--- a/ci/test-nightly.sh
+++ b/ci/test-nightly.sh
@@ -6,7 +6,6 @@ rustc --version
 cargo --version
 
 rustup component add rustfmt-preview
-cargo fmt -- --write-mode=diff
 cargo build --verbose --features unstable
 cargo test --verbose --features unstable