diff --git a/tests/support/server.tcl b/tests/support/server.tcl
index 525780dd3f..9226356ff0 100644
--- a/tests/support/server.tcl
+++ b/tests/support/server.tcl
@@ -660,7 +660,7 @@ proc start_server {options {code undefined}} {
     if {[dict exists $config $port_param]} { set port [dict get $config $port_param] }
 
     # setup config dict
-    dict set src "executable" $executable
+    dict set srv "executable" $executable
     dict set srv "config_file" $config_file
     dict set srv "config" $config
     dict set srv "pid" $pid