diff --git a/test/fuzz/readKeyBinary.js b/test/fuzz/readKeyBinary.js
index 3715bb5a2..4fae8415d 100644
--- a/test/fuzz/readKeyBinary.js
+++ b/test/fuzz/readKeyBinary.js
@@ -10,9 +10,9 @@ function ignoredError(error) {
  * @param { Buffer } inputData
  */
 export function fuzz (inputData) {
-  const binaryKey = new Uint8Array(`-----BEGIN PGP PRIVATE KEY BLOCK-----\n ${inputData.toString('base64')} -----END PGP PRIVATE KEY BLOCK-----`);
-
-  return readKey({ binaryKey })
+  const binaryKey = `-----BEGIN PGP PRIVATE KEY BLOCK-----\n\n${inputData.toString('base64')}\n-----END PGP PRIVATE KEY BLOCK-----`;
+  const bufferedKey = new Uint8Array(Buffer.from(binaryKey, 'utf8'));
+  return readKey({ binaryKey: bufferedKey })
     .catch(error => {
       if (error.message && !ignoredError(error)) {
         throw error;
diff --git a/test/fuzz/readMessageBinary.js b/test/fuzz/readMessageBinary.js
index ae277bfa3..aa5b182c9 100644
--- a/test/fuzz/readMessageBinary.js
+++ b/test/fuzz/readMessageBinary.js
@@ -10,9 +10,9 @@ function ignoredError(error) {
  * @param { Buffer } inputData
  */
 export function fuzz (inputData) {
-  const binaryMessage = new Uint8Array(`-----BEGIN PGP MESSAGE-----\n ${inputData.toString('base64')} -----END PGP MESSAGE-----`);
-
-  return readMessage({ binaryMessage })
+  const binaryMessage = `-----BEGIN PGP MESSAGE-----\n\n${inputData.toString('base64')}\n-----END PGP MESSAGE-----`;
+  const bufferedMessage = new Uint8Array(Buffer.from(binaryMessage, 'utf8'));
+  return readMessage({ binaryMessage: bufferedMessage })
     .catch(error => {
       if (error.message && !ignoredError(error)) {
         throw error;