diff --git a/services/crypto/tests/unit/head_helpers.js b/services/crypto/tests/unit/head_helpers.js
index 13a4358ba440..5791fbd1a66e 100644
--- a/services/crypto/tests/unit/head_helpers.js
+++ b/services/crypto/tests/unit/head_helpers.js
@@ -47,7 +47,7 @@ function base64UrlDecode(s) {
       s += "=";
       break; // One pad char
     default:
-      throw new Error("Illegal base64url string!");
+      throw new InputException("Illegal base64url string!");
   }
 
   // With correct padding restored, apply the standard base64 decoder
diff --git a/services/crypto/tests/unit/test_jwcrypto.js b/services/crypto/tests/unit/test_jwcrypto.js
index fe91e4bac645..071f3123ba85 100644
--- a/services/crypto/tests/unit/test_jwcrypto.js
+++ b/services/crypto/tests/unit/test_jwcrypto.js
@@ -62,7 +62,7 @@ function test_rsa() {
   do_test_pending();
   function checkRSA(err, kpo) {
     do_check_neq(kpo, undefined);
-    do_print(kpo.serializedPublicKey);
+    log(kpo.serializedPublicKey);
     let pk = JSON.parse(kpo.serializedPublicKey);
     do_check_eq(pk.algorithm, "RS");
 /* TODO
@@ -92,7 +92,7 @@ function test_dsa() {
   do_test_pending();
   function checkDSA(err, kpo) {
     do_check_neq(kpo, undefined);
-    do_print(kpo.serializedPublicKey);
+    log(kpo.serializedPublicKey);
     let pk = JSON.parse(kpo.serializedPublicKey);
     do_check_eq(pk.algorithm, "DS");
 /* TODO