diff --git a/anybadge/badge.py b/anybadge/badge.py
index c9f08c7..3e992e1 100644
--- a/anybadge/badge.py
+++ b/anybadge/badge.py
@@ -746,21 +746,28 @@ class Badge:
             (color, ", ".join(list(Color.__members__.keys()))),
         )
 
-    def write_badge(self, file_path, overwrite=False) -> None:
+    def write_badge(self, file_path: Union[str, Path], overwrite=False) -> None:
         """Write badge to file."""
 
+        if isinstance(file_path, str):
+
+            if file_path.endswith("/"):
+                raise ValueError("File location may not be a directory.")
+
+            file: Path = Path(file_path)
+        else:
+            file = file_path
+
         # Validate path (part 1)
-        if file_path.endswith("/"):
+        if file.is_dir():
             raise ValueError("File location may not be a directory.")
 
-        # Get absolute filepath
-        path = os.path.abspath(file_path)
-        if not path.lower().endswith(".svg"):
-            path += ".svg"
+        # Ensure we're using a .svg extension
+        file = file.with_suffix(".svg")
 
         # Validate path (part 2)
-        if not overwrite and os.path.exists(path):
-            raise RuntimeError('File "{}" already exists.'.format(path))
+        if not overwrite and file.exists():
+            raise RuntimeError('File "{}" already exists.'.format(file))
 
-        with open(path, mode="w") as file_handle:
+        with open(file, mode="w") as file_handle:
             file_handle.write(self.badge_svg_text)
diff --git a/tests/test_anybadge.py b/tests/test_anybadge.py
index d7f3b30..7ca4f25 100644
--- a/tests/test_anybadge.py
+++ b/tests/test_anybadge.py
@@ -4,6 +4,9 @@ from anybadge import Badge
 from anybadge.cli import main, parse_args
 
 
+TESTS_DIR = Path(__file__).parent
+
+
 class TestAnybadge(TestCase):
     """Test case class for anybadge package."""
 
@@ -267,8 +270,14 @@ class TestAnybadge(TestCase):
         with self.assertRaisesRegex(
             RuntimeError, r'File ".*tests\/exists\.svg" already exists\.'
         ):
-            badge.write_badge("tests/exists")
-            badge.write_badge("tests/exists")
+            badge.write_badge(TESTS_DIR / Path("exists"))
+            badge.write_badge(TESTS_DIR / Path("exists"))
+
+        with self.assertRaisesRegex(
+            RuntimeError, r'File ".*tests\/exists\.svg" already exists\.'
+        ):
+            badge.write_badge(str(TESTS_DIR / Path("exists")))
+            badge.write_badge(str(TESTS_DIR / Path("exists")))
 
     def test_arg_parsing(self):
         args = parse_args(["-l", "label", "-v", "value"])