diff --git a/tests/conftest.py b/tests/conftest.py
index ba28c1c..3b73a8a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -14,7 +14,7 @@
     QgsVectorLayer,
 )
 from qgis.gui import QgsMapCanvas
-from qgis.PyQt.QtCore import QRectF, QSize
+from qgis.PyQt.QtCore import QLocale, QRectF, QSize
 from qgis.PyQt.QtGui import QImage, QPainter, qRgba
 
 from BivariateRenderer.colorramps.color_ramps_register import (
@@ -26,6 +26,11 @@
 from BivariateRenderer.renderer.bivariate_renderer_widget import BivariateRendererWidget
 
 
+@pytest.fixture(autouse=True, scope="session")
+def change_locale():
+    """Sets locale to English, United Kingdom for all tests to ensure consistent results."""
+    QLocale.setDefault(QLocale(QLocale.Language.English, QLocale.Country.UnitedKingdom))
+
 @pytest.fixture
 def qgs_project(qgis_iface) -> QgsProject:
     qgis_iface.newProject()
diff --git a/tests/images/correct/legend_with_all.png b/tests/images/correct/legend_with_all.png
index f2a079c..411c2f3 100755
Binary files a/tests/images/correct/legend_with_all.png and b/tests/images/correct/legend_with_all.png differ
diff --git a/tests/images/correct/legend_with_all_rotated.png b/tests/images/correct/legend_with_all_rotated.png
index 2f204b4..718cc7b 100755
Binary files a/tests/images/correct/legend_with_all_rotated.png and b/tests/images/correct/legend_with_all_rotated.png differ
diff --git a/tests/images/correct/legend_with_values_ticks.png b/tests/images/correct/legend_with_values_ticks.png
index b6f67a8..02532ab 100755
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diff --git a/tests/images/correct/legend_with_values_ticks_midpoints.png b/tests/images/correct/legend_with_values_ticks_midpoints.png
index cdce7f9..9d5e0bb 100755
Binary files a/tests/images/correct/legend_with_values_ticks_midpoints.png and b/tests/images/correct/legend_with_values_ticks_midpoints.png differ
diff --git a/tests/images/correct/widget_layout_item.png b/tests/images/correct/widget_layout_item.png
index 457edf7..0bbc35c 100755
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diff --git a/tests/images/correct/widget_renderer.png b/tests/images/correct/widget_renderer.png
index 4d13571..7080265 100755
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