diff --git a/tests/.gitignore b/tests/.gitignore
index 663d85c5a..323656295 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -1,6 +1,7 @@
 *.test
 *.log
 *.out
+*.vcd
 
 ngspiceCkt
 hspiceCkt