diff --git a/tests/runtests.pl b/tests/runtests.pl
index a8d597ccc8aaea..f2f92c8346216a 100755
--- a/tests/runtests.pl
+++ b/tests/runtests.pl
@@ -5800,6 +5800,10 @@ sub runtimestats {
 get_disttests();
 init_serverpidfile_hash();
 
+if(pathhelp::os_is_win()) {
+    $defpostcommanddelay = 0.1;
+}
+
 #######################################################################
 # Output curl version and host info being tested
 #