diff --git a/bin/c8.js b/bin/c8.js
index 719272c8..947f1cff 100755
--- a/bin/c8.js
+++ b/bin/c8.js
@@ -27,8 +27,9 @@ let argv = buildYargs().parse(instrumenterArgs)
     }
 
     process.env.NODE_V8_COVERAGE = argv.tempDirectory
-    foreground(hideInstrumenterArgs(argv), () => {
+    foreground(hideInstrumenterArgs(argv), done => {
       outputReport(argv)
+      done()
     })
   }
 })()