diff --git a/kitty/shaders/slang.py b/kitty/shaders/slang.py
index fc5bd8da6..c56c1f109 100644
--- a/kitty/shaders/slang.py
+++ b/kitty/shaders/slang.py
@@ -466,6 +466,7 @@ def main() -> None:
         parallel_run(needed)
     compile_builtin_shaders(sys.argv[-2], sys.argv[-1], prun)
 
+
 def test_slang_build() -> None:
     import subprocess
     if shutil.which(slangc[0]) is None:
diff --git a/kitty/shaders/validate_shaders.py b/kitty/shaders/validate_shaders.py
index 9ea3a0162..7d1002b6f 100755
--- a/kitty/shaders/validate_shaders.py
+++ b/kitty/shaders/validate_shaders.py
@@ -2,6 +2,7 @@
 import subprocess
 import sys
 from pathlib import Path
+from typing import Iterable
 
 # Map the custom extensions to the required glslangValidator stage strings
 stage_mapping = {
@@ -12,7 +13,7 @@ stage_mapping = {
 }
 
 
-def validate_glsl_files(shader_files: list[str], verbose: bool = False) -> None:
+def validate_glsl_files(shader_files: Iterable[str | Path], verbose: bool = False) -> None:
     error_count = 0
 
     # Process each shader file