diff --git a/lib/index.js b/lib/index.js
index d0ff9df..7d749ed 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -535,7 +535,7 @@ function createIntegrity (opts) {
       hashes.forEach(h => h.update(chunk, enc))
       return this
     },
-    digest: function (enc) {
+    digest: function () {
       const integrity = algorithms.reduce((acc, algo) => {
         const digest = hashes.shift().digest('base64')
         const hash = new Hash(
diff --git a/test/check.js b/test/check.js
index 6ca6cca..dfe51e5 100644
--- a/test/check.js
+++ b/test/check.js
@@ -111,7 +111,7 @@ test('checkData', t => {
       `sha1-${hash(TEST_DATA, 'sha1')}`,
       `sha512-${hash(TEST_DATA, 'sha512')}`,
     ].join(' '), {
-      pickAlgorithm: (a, b) => {
+      pickAlgorithm: () => {
         return false
       },
     }),
diff --git a/test/integrity.js b/test/integrity.js
index acd0a1e..3a827c6 100644
--- a/test/integrity.js
+++ b/test/integrity.js
@@ -122,7 +122,7 @@ test('pickAlgorithm()', t => {
   )
   t.equal(
     sri.pickAlgorithm({
-      pickAlgorithm: (a, b) => 'sha384',
+      pickAlgorithm: () => 'sha384',
     }),
     'sha384',
     'custom pickAlgorithm function accepted'