diff --git a/betterproto/tests/test_casing.py b/betterproto/tests/test_casing.py
index f777e2c..ac18309 100644
--- a/betterproto/tests/test_casing.py
+++ b/betterproto/tests/test_casing.py
@@ -9,6 +9,7 @@ from betterproto.casing import camel_case, pascal_case, snake_case
         ("", ""),
         ("a", "A"),
         ("foobar", "Foobar"),
+        ("fooBar", "FooBar"),
         ("FooBar", "FooBar"),
         ("foo.bar", "FooBar"),
         ("foo_bar", "FooBar"),
@@ -38,6 +39,7 @@ def test_pascal_case(value, expected):
         ("", ""),
         ("a", "a"),
         ("foobar", "foobar"),
+        ("fooBar", "fooBar"),
         ("FooBar", "fooBar"),
         ("foo.bar", "fooBar"),
         ("foo_bar", "fooBar"),
@@ -65,6 +67,7 @@ def test_camel_case(value, expected):
         ("", ""),
         ("a", "a"),
         ("foobar", "foobar"),
+        ("fooBar", "foo_bar"),
         ("FooBar", "foo_bar"),
         ("foo.bar", "foo_bar"),
         ("foo_bar", "foo_bar"),