diff --git a/ci/docker/x86_64-unknown-linux-gnux32/Dockerfile b/ci/docker/x86_64-unknown-linux-gnux32/Dockerfile
new file mode 100644
index 0000000000000000000000000000000000000000..1af41343e268bd69789efd5327311b7c892dc75a
--- /dev/null
+++ b/ci/docker/x86_64-unknown-linux-gnux32/Dockerfile
@@ -0,0 +1,5 @@
+FROM ubuntu:17.04
+RUN apt-get update
+RUN apt-get install -y --no-install-recommends \
+  gcc-multilib libc6-dev ca-certificates
+ENV PATH=$PATH:/rust/bin
diff --git a/ci/run.sh b/ci/run.sh
index 51a2c68714ccfbc8868119d24ccf3416de3b67ac..65d716e956660edd24f7c466d188a4ee4b07b0c9 100755
--- a/ci/run.sh
+++ b/ci/run.sh
@@ -68,4 +68,10 @@ if [ "$QEMU" != "" ]; then
   exec grep "^PASSED .* tests" $CARGO_TARGET_DIR/out.log
 fi
 
-exec cargo test --manifest-path libc-test/Cargo.toml --target $TARGET
+# FIXME: x86_64-unknown-linux-gnux32 fail to compile wihout --release
+opt=
+if [ "$TARGET" = "x86_64-unknown-linux-gnux32" ]; then
+  opt="--release"
+fi
+
+exec cargo test $opt --manifest-path libc-test/Cargo.toml --target $TARGET