diff --git a/util/test/demos/test_common.cpp b/util/test/demos/test_common.cpp
index b6ff73b9a..5dde09bd3 100644
--- a/util/test/demos/test_common.cpp
+++ b/util/test/demos/test_common.cpp
@@ -491,7 +491,7 @@ std::vector<uint32_t> CompileShaderToSpv(const std::string &source_text, SPIRVTa
     return ret;
   }
 
-  msleep(100);
+  msleep(400);
 
   int code = pclose(pipe);