diff --git a/.travis.yml b/.travis.yml
index c16dd9122..f443fd659 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ sudo: false
 env:
   global:
     # If changing this number, please also change it in `test/test_helper.rb`.
-    - STRIPE_MOCK_VERSION=0.44.0
+    - STRIPE_MOCK_VERSION=0.47.0
 
 cache:
   directories:
diff --git a/test/stripe/account_test.rb b/test/stripe/account_test.rb
index 54d6ab279..dc2dbdec7 100644
--- a/test/stripe/account_test.rb
+++ b/test/stripe/account_test.rb
@@ -100,7 +100,12 @@ class AccountTest < Test::Unit::TestCase
 
     context "#legal_entity=" do
       should "disallow direct overrides" do
-        account = Stripe::Account.retrieve("acct_123")
+        account = Stripe::Account.construct_from(
+          id: "acct_123",
+          legal_entity: {
+            first_name: "name",
+          }
+        )
 
         assert_raise NoMethodError do
           account.legal_entity = { first_name: "Blah" }
@@ -111,7 +116,7 @@ class AccountTest < Test::Unit::TestCase
     end
 
     context "#serialize_params" do
-      should "serialize an a new additional_owners" do
+      should "serialize a new additional_owners" do
         obj = Stripe::Util.convert_to_stripe_object({
           object: "account",
           legal_entity: Stripe::StripeObject.construct_from({
diff --git a/test/stripe/api_resource_test.rb b/test/stripe/api_resource_test.rb
index ad5f22660..d2eb4fc34 100644
--- a/test/stripe/api_resource_test.rb
+++ b/test/stripe/api_resource_test.rb
@@ -375,20 +375,22 @@ class NestedTestAPIResource < Stripe::APIResource
       end
 
       should "correctly handle replaced nested objects" do
-        acct = Stripe::Account.construct_from(id: "myid",
-                                              legal_entity: {
-                                                last_name: "Smith",
-                                                address: {
-                                                  line1: "test",
-                                                  city: "San Francisco",
-                                                },
-                                              })
-
-        stub_request(:post, "#{Stripe.api_base}/v1/accounts/myid")
-          .with(body: { legal_entity: { address: { line1: "Test2", city: "" } } })
+        acct = Stripe::Account.construct_from(
+          id: "acct_123",
+          company: {
+            name: "company_name",
+            address: {
+              line1: "test",
+              city: "San Francisco",
+            },
+          }
+        )
+
+        stub_request(:post, "#{Stripe.api_base}/v1/accounts/acct_123")
+          .with(body: { company: { address: { line1: "Test2", city: "" } } })
           .to_return(body: JSON.generate("id" => "my_id"))
 
-        acct.legal_entity.address = { line1: "Test2" }
+        acct.company.address = { line1: "Test2" }
         acct.save
       end
 
diff --git a/test/test_helper.rb b/test/test_helper.rb
index a3a428e5f..56f38b62a 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -17,7 +17,7 @@
 require ::File.expand_path("../stripe_mock", __FILE__)
 
 # If changing this number, please also change it in `.travis.yml`.
-MOCK_MINIMUM_VERSION = "0.44.0".freeze
+MOCK_MINIMUM_VERSION = "0.47.0".freeze
 MOCK_PORT = Stripe::StripeMock.start
 
 # Disable all real network connections except those that are outgoing to