diff --git a/appveyor.yml b/appveyor.yml
index 4804623..b01a1e9 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -18,6 +18,7 @@ build_script:
   - mkdir build
   - cd build
   - git clone https://github.com/toml-lang/toml.git
+  - file -I toml/example/hard_example_unicode.toml
   - cmake -G"%generator%" -DBOOST_ROOT=C:/Libraries/boost_1_63_0 ..
   - cmake --build . --config "%configuration%"