diff --git a/.github/workflow/test.yml b/.github/workflow/test.yml
index 64c3e4c..b44ca7a 100644
--- a/.github/workflow/test.yml
+++ b/.github/workflow/test.yml
@@ -9,7 +9,7 @@ on:
 jobs:
   build:
     name: Build
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, windows-latest]
     strategy:
       fail-fast: false
       matrix:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0c2efc4..74d0ea4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ on:
 jobs:
   build:
     name: Build
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, windows-latest]
     strategy:
       fail-fast: false
       matrix:
diff --git a/tests/__init__.py b/tests/__init__.py
index 31eac93..f634674 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -20,7 +20,7 @@ def get_test_files(path, prefix):
 def _test_files(path, language, is_ordinal=True):
     fnx = parse_ordinal if is_ordinal else parse_number
     for filename in get_test_files(path, f'{language}_'):
-        with open(filename, "r") as csv_file:
+        with open(filename, "r", encoding='utf8') as csv_file:
             csv_reader = csv.DictReader(csv_file)
             for row in csv_reader:
                 try: