diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6cbf5d3a40ee9..6e2b87104a203 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [10.x, 12.x, 14.x]
+        node-version: ['10.0', 10.x, '12.0', 12.x, '14.0', 14.x]
         platform:
         - os: ubuntu-latest
           shell: bash
diff --git a/lib/utils/reify-finish.js b/lib/utils/reify-finish.js
index 76dba06cb570c..9c95e9fcff24e 100644
--- a/lib/utils/reify-finish.js
+++ b/lib/utils/reify-finish.js
@@ -1,7 +1,9 @@
 const reifyOutput = require('./reify-output.js')
 const npm = require('../npm.js')
 const ini = require('ini')
-const {writeFile} = require('fs').promises
+const util = require('util')
+const fs = require('fs')
+const { writeFile } = fs.promises || { writeFile: util.promisify(fs.writeFile) }
 const {resolve} = require('path')
 
 const reifyFinish = async arb => {
diff --git a/test/lib/utils/reify-finish.js b/test/lib/utils/reify-finish.js
index d6c7d2e7b2d6d..dc87050d4b229 100644
--- a/test/lib/utils/reify-finish.js
+++ b/test/lib/utils/reify-finish.js
@@ -78,3 +78,11 @@ t.test('should write if everything above passes', async t => {
   const data = fs.readFileSync(`${path}/npmrc`, 'utf8').replace(/\r\n/g, '\n')
   t.matchSnapshot(data, 'written config')
 })
+
+t.test('works without fs.promises', async t => {
+  t.doesNotThrow(() => requireInject('../../../lib/utils/reify-finish.js', {
+    fs: { ...fs, promises: null },
+    '../../../lib/npm.js': npm,
+    '../../../lib/utils/reify-output.js': reifyOutput,
+  }))
+})