diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b98380d..27a6250 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -14,20 +14,20 @@ check-example:
   before_script:
     - cargo -V
   script:
-    - cd example
-    - cargo check
+    - cargo check --manifest-path example/Cargo.toml
   cache:
     key: cargo-stable-example
     paths:
       - cargo/
       - target/
-  
+
 test-default:
   stage: test
   image: rust:1.49-slim
   before_script:
     - cargo -V
   script:
+    - cargo test --manifest-path openapi_type/Cargo.toml -- --skip trybuild
     - cargo test
   cache:
     key: cargo-1-49-default
@@ -43,6 +43,7 @@ test-full:
     - apt install -y --no-install-recommends libpq-dev
     - cargo -V
   script:
+    - cargo test --manifest-path openapi_type/Cargo.toml --all-features -- --skip trybuild
     - cargo test --no-default-features --features full
   cache:
     key: cargo-1-49-all
@@ -79,6 +80,7 @@ test-trybuild-ui:
     - apt install -y --no-install-recommends libpq-dev
     - cargo -V
   script:
+    - cargo test --manifest-path openapi_type/Cargo.toml --all-features -- trybuild
     - cargo test --no-default-features --features full --tests -- --ignored
   cache:
     key: cargo-1-50-all
@@ -107,8 +109,9 @@ rustfmt:
     - cargo -V
     - cargo fmt --version
   script:
-    - cargo fmt -- --check
+    - cargo fmt --all -- --check
     - ./tests/ui/rustfmt.sh --check
+    - ./openapi-type/tests/fail/rustfmt.sh --check
 
 doc:
   stage: build
diff --git a/openapi_type/tests/fail/not_openapitype_generics.stderr b/openapi_type/tests/fail/not_openapitype_generics.stderr
index d41098b..d33bafe 100644
--- a/openapi_type/tests/fail/not_openapitype_generics.stderr
+++ b/openapi_type/tests/fail/not_openapitype_generics.stderr
@@ -16,6 +16,8 @@ error[E0599]: no function or associated item named `schema` found for struct `Fo
    = note: the method `schema` exists but the following trait bounds were not satisfied:
            `Bar: OpenapiType`
            which is required by `Foo<Bar>: OpenapiType`
+           `Foo<Bar>: OpenapiType`
+           which is required by `&Foo<Bar>: OpenapiType`
    = help: items from traits can only be used if the trait is implemented and in scope
    = note: the following trait defines an item `schema`, perhaps you need to implement it:
            candidate #1: `OpenapiType`
diff --git a/openapi_type/tests/fail/rustfmt.sh b/openapi_type/tests/fail/rustfmt.sh
new file mode 100755
index 0000000..a93f958
--- /dev/null
+++ b/openapi_type/tests/fail/rustfmt.sh
@@ -0,0 +1,21 @@
+#!/bin/busybox ash
+set -euo pipefail
+
+rustfmt=${RUSTFMT:-rustfmt}
+version="$($rustfmt -V)"
+case "$version" in
+	*nightly*)
+		# all good, no additional flags required
+		;;
+	*)
+		# assume we're using some sort of rustup setup
+		rustfmt="$rustfmt +nightly"
+		;;
+esac
+
+return=0
+find "$(dirname "$0")" -name '*.rs' -type f | while read file; do
+	$rustfmt --config-path "$(dirname "$0")/../../../rustfmt.toml" "$@" "$file" || return=1
+done
+
+exit $return