diff --git a/ci/run.sh b/ci/run.sh
index ffcd0421..27ffc054 100755
--- a/ci/run.sh
+++ b/ci/run.sh
@@ -79,7 +79,7 @@ if [ "$QEMU" != "" ]; then
   exec grep "^PASSED .* tests" $CARGO_TARGET_DIR/out.log
 fi
 
-# FIXME: x86_64-unknown-linux-gnux32 fail to compile wihout --release
+# FIXME: x86_64-unknown-linux-gnux32 fail to compile without --release
 # See https://github.com/rust-lang/rust/issues/45417
 opt=
 if [ "$TARGET" = "x86_64-unknown-linux-gnux32" ]; then
@@ -91,4 +91,8 @@ fi
 if [ "$TARGET" != "x86_64-rumprun-netbsd" ]; then
   cargo test $opt --no-default-features --manifest-path libc-test/Cargo.toml --target $TARGET
 fi
+# Test the #[repr(align(x))] feature if this is building on Rust >= 1.25
+if [ $(rustc --version | sed -E 's/^rustc 1\.([0-9]*)\..*/\1/') -ge 25 ]; then
+  cargo test $opt --features align --manifest-path libc-test/Cargo.toml --target $TARGET
+fi
 exec cargo test $opt --manifest-path libc-test/Cargo.toml --target $TARGET
diff --git a/libc-test/Cargo.toml b/libc-test/Cargo.toml
index 8d0f9d34..c6950d6e 100644
--- a/libc-test/Cargo.toml
+++ b/libc-test/Cargo.toml
@@ -14,6 +14,7 @@ ctest = { git = "https://github.com/alexcrichton/ctest" }
 [features]
 default = [ "use_std" ]
 use_std = [ "libc/use_std" ]
+align = [ "libc/align" ]
 
 [[test]]
 name = "main"