diff --git a/client/src/modules/stress_test/stress_run_diagram.tsx b/client/src/modules/stress_test/stress_run_diagram.tsx
index 283fc99..3e68989 100644
--- a/client/src/modules/stress_test/stress_run_diagram.tsx
+++ b/client/src/modules/stress_test/stress_run_diagram.tsx
@@ -162,7 +162,7 @@ class StressRunDiagram extends React.Component<StressRunDiagramProps, StressRunD
             type: 'scatter',
             symbol: 'rect',
             silent: true,
-            symbolSize: [30, 3],
+            symbolSize: [30 * 20 / names.length, 3],
             z: 20
         };
         return {