diff --git a/tests/ImageSharp.Tests/TestImages.cs b/tests/ImageSharp.Tests/TestImages.cs
index c282d8166..7c383d389 100644
--- a/tests/ImageSharp.Tests/TestImages.cs
+++ b/tests/ImageSharp.Tests/TestImages.cs
@@ -377,14 +377,14 @@ public static class TestImages
         public const string Os2v2Short = "Bmp/pal8os2v2-16.bmp";
         public const string Os2v2 = "Bmp/pal8os2v2.bmp";
         public const string Os2BitmapArray = "Bmp/ba-bm.bmp";
-        public const string Os2BitmapArray9s = "Bmp/9S.BMP";
-        public const string Os2BitmapArrayDiamond = "Bmp/DIAMOND.BMP";
-        public const string Os2BitmapArrayMarble = "Bmp/GMARBLE.BMP";
-        public const string Os2BitmapArraySkater = "Bmp/SKATER.BMP";
-        public const string Os2BitmapArraySpade = "Bmp/SPADE.BMP";
-        public const string Os2BitmapArraySunflower = "Bmp/SUNFLOW.BMP";
-        public const string Os2BitmapArrayWarpd = "Bmp/WARPD.BMP";
-        public const string Os2BitmapArrayPines = "Bmp/PINES.BMP";
+        public const string Os2BitmapArray9s = "Bmp/9S.bmp";
+        public const string Os2BitmapArrayDiamond = "Bmp/DIAMOND.bmp";
+        public const string Os2BitmapArrayMarble = "Bmp/GMARBLE.bmp";
+        public const string Os2BitmapArraySkater = "Bmp/SKATER.bmp";
+        public const string Os2BitmapArraySpade = "Bmp/SPADE.bmp";
+        public const string Os2BitmapArraySunflower = "Bmp/SUNFLOW.bmp";
+        public const string Os2BitmapArrayWarpd = "Bmp/WARPD.bmp";
+        public const string Os2BitmapArrayPines = "Bmp/PINES.bmp";
         public const string LessThanFullSizedPalette = "Bmp/pal8os2sp.bmp";
         public const string Pal8Offset = "Bmp/pal8offs.bmp";
         public const string OversizedPalette = "Bmp/pal8oversizepal.bmp";
diff --git a/tests/Images/Input/Bmp/9S.BMP b/tests/Images/Input/Bmp/9S.bmp
similarity index 100%
rename from tests/Images/Input/Bmp/9S.BMP
rename to tests/Images/Input/Bmp/9S.bmp
diff --git a/tests/Images/Input/Bmp/DIAMOND.BMP b/tests/Images/Input/Bmp/DIAMOND.bmp
similarity index 100%
rename from tests/Images/Input/Bmp/DIAMOND.BMP
rename to tests/Images/Input/Bmp/DIAMOND.bmp
diff --git a/tests/Images/Input/Bmp/GMARBLE.BMP b/tests/Images/Input/Bmp/GMARBLE.bmp
similarity index 100%
rename from tests/Images/Input/Bmp/GMARBLE.BMP
rename to tests/Images/Input/Bmp/GMARBLE.bmp
diff --git a/tests/Images/Input/Bmp/PINES.BMP b/tests/Images/Input/Bmp/PINES.bmp
similarity index 100%
rename from tests/Images/Input/Bmp/PINES.BMP
rename to tests/Images/Input/Bmp/PINES.bmp
diff --git a/tests/Images/Input/Bmp/SKATER.BMP b/tests/Images/Input/Bmp/SKATER.bmp
similarity index 100%
rename from tests/Images/Input/Bmp/SKATER.BMP
rename to tests/Images/Input/Bmp/SKATER.bmp
diff --git a/tests/Images/Input/Bmp/SPADE.BMP b/tests/Images/Input/Bmp/SPADE.bmp
similarity index 100%
rename from tests/Images/Input/Bmp/SPADE.BMP
rename to tests/Images/Input/Bmp/SPADE.bmp
diff --git a/tests/Images/Input/Bmp/SUNFLOW.BMP b/tests/Images/Input/Bmp/SUNFLOW.bmp
similarity index 100%
rename from tests/Images/Input/Bmp/SUNFLOW.BMP
rename to tests/Images/Input/Bmp/SUNFLOW.bmp
diff --git a/tests/Images/Input/Bmp/WARPD.BMP b/tests/Images/Input/Bmp/WARPD.bmp
similarity index 100%
rename from tests/Images/Input/Bmp/WARPD.BMP
rename to tests/Images/Input/Bmp/WARPD.bmp