Fix tests locale errors

test/__init__.py

@@ -25,6 +25,9 @@
 import glob
 import os.path
 
+# Ensure options are loaded for all tests
+import picard.options  # noqa: F401
+
 
 for filename in glob.glob(os.path.join(os.path.dirname(__file__), "test_*.py")):
     __import__("test." + os.path.basename(filename)[:-3])

test/test_coverart_details_option.py

@@ -15,6 +15,7 @@
     Option,
     get_config,
 )
+from picard.i18n import setup_gettext
 
 import pytest
 
@@ -62,6 +63,12 @@ def devicePixelRatio() -> float:  # pragma: no cover - constant
     return cast(QApplication, app)
 
 
+@pytest.fixture(autouse=True)
+def i18n_c_locale() -> None:
+    # Ensure deterministic number formatting
+    setup_gettext(None, 'C')
+
+
 @dataclass
 class DummyImage:
     types_text: str

test/test_i18n.py

@@ -49,6 +49,9 @@
 
 
 class TestI18n(PicardTestCase):
+    def tearDown(self):
+        setup_gettext(None, 'C')
+
     def test_missing_locales(self):
         tmplocaledir = tempfile.mkdtemp()