diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8995613..9345e13 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,7 +50,7 @@ jobs:
 
         - name: Node.js 8.x
           node-version: "8.17"
-          npm-i: mocha@7.2.0
+          npm-i: mocha@7.2.0 nyc@14.1.1
 
         - name: Node.js 10.x
           node-version: "10.24"