diff --git a/python/test/utils.py b/python/test/utils.py
index 4a711ba1..bfa5dcdf 100644
--- a/python/test/utils.py
+++ b/python/test/utils.py
@@ -2,6 +2,7 @@
 
 
 def compile_source(source):
-    os.system("glslangValidator --stdin -S comp -V -o tmp_kp_shader.comp.spv << END\n" + source + "\nEND")
+    open("tmp_kp_shader.comp", "w").write(source)
+    os.system("glslangValidator -V tmp_kp_shader.comp -o tmp_kp_shader.comp.spv")
     return open("tmp_kp_shader.comp.spv", "rb").read()