diff --git a/spec/deep_hash_accessor_spec.rb b/spec/deep_hash_accessor_spec.rb
index b066e18..3f45f16 100644
--- a/spec/deep_hash_accessor_spec.rb
+++ b/spec/deep_hash_accessor_spec.rb
@@ -12,7 +12,8 @@
         city: "San Francisco",
         country: "USA"
       },
-      hobbies: %w[reading cycling]
+      hobbies: %w[reading cycling],
+      pets: [{name: "Rex", species: "dog"}]
     }
   end
 
@@ -36,6 +37,11 @@
     it "returns arrays as is for simple types" do
       expect(accessor.hobbies).to eq(%w[reading cycling])
     end
+
+    it "wraps hashes inside arrays" do
+      expect(accessor.pets.first).to be_a(described_class)
+      expect(accessor.pets.first.name).to eq("Rex")
+    end
   end
 
   describe "non-existent keys" do
diff --git a/spec/resources/resource_errors_spec.rb b/spec/resources/resource_errors_spec.rb
new file mode 100644
index 0000000..47f47f1
--- /dev/null
+++ b/spec/resources/resource_errors_spec.rb
@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+RSpec.describe "resource errors and warnings" do
+  describe Seam::Resources::ResourceErrorsSupport do
+    it "converts error hashes into ResourceError objects" do
+      device = Seam::Resources::Device.load_from_response(
+        "device_id" => "device_id_1234",
+        "errors" => [
+          {
+            "error_code" => "device_removed",
+            "message" => "Device was removed",
+            "created_at" => "2024-01-01T00:00:00Z"
+          }
+        ]
+      )
+
+      error = device.errors.first
+      expect(error).to be_a(Seam::Resources::ResourceError)
+      expect(error.error_code).to eq("device_removed")
+      expect(error.message).to eq("Device was removed")
+      expect(error.created_at).to be_a(Time)
+    end
+
+    it "returns an empty array when the resource has no errors" do
+      device = Seam::Resources::Device.load_from_response("device_id" => "device_id_1234")
+
+      expect(device.errors).to eq([])
+    end
+  end
+
+  describe Seam::Resources::ResourceWarningsSupport do
+    it "converts warning hashes into ResourceWarning objects" do
+      device = Seam::Resources::Device.load_from_response(
+        "device_id" => "device_id_1234",
+        "warnings" => [
+          {
+            "warning_code" => "privacy_mode",
+            "message" => "Device is in privacy mode",
+            "created_at" => "2024-01-01T00:00:00Z"
+          }
+        ]
+      )
+
+      warning = device.warnings.first
+      expect(warning).to be_a(Seam::Resources::ResourceWarning)
+      expect(warning.warning_code).to eq("privacy_mode")
+      expect(warning.message).to eq("Device is in privacy mode")
+      expect(warning.created_at).to be_a(Time)
+    end
+
+    it "returns an empty array when the resource has no warnings" do
+      device = Seam::Resources::Device.load_from_response("device_id" => "device_id_1234")
+
+      expect(device.warnings).to eq([])
+    end
+  end
+end
diff --git a/spec/seam_client/malformed_response_spec.rb b/spec/seam_client/malformed_response_spec.rb
new file mode 100644
index 0000000..86f6987
--- /dev/null
+++ b/spec/seam_client/malformed_response_spec.rb
@@ -0,0 +1,51 @@
+# frozen_string_literal: true
+
+# The fake cannot produce malformed error responses, so WebMock drives the
+# bodies that must fall through seam_api_error_response? to Faraday's own
+# error handling rather than being parsed into a Seam::Http::ApiError.
+RSpec.describe Seam::Http::Request do
+  let(:seam) { Seam.new(api_key: "seam_some_api_key") }
+  let(:url) { "#{Seam::DEFAULT_ENDPOINT}/devices/list" }
+
+  describe "non-Seam error responses" do
+    it "raises a Faraday error for a plain text response" do
+      stub_request(:post, url).to_return(
+        status: 500,
+        body: "Internal Server Error",
+        headers: {"Content-Type" => "text/plain"}
+      )
+
+      expect { seam.devices.list }.to raise_error(Faraday::ServerError)
+    end
+
+    it "raises a Faraday error for malformed JSON" do
+      stub_request(:post, url).to_return(
+        status: 500,
+        body: "{invalid json",
+        headers: {"Content-Type" => "application/json"}
+      )
+
+      expect { seam.devices.list }.to raise_error(Faraday::ServerError)
+    end
+
+    it "raises a Faraday error for JSON without an error object" do
+      stub_request(:post, url).to_return(
+        status: 500,
+        body: {message: "Some error"}.to_json,
+        headers: {"Content-Type" => "application/json"}
+      )
+
+      expect { seam.devices.list }.to raise_error(Faraday::ServerError)
+    end
+
+    it "raises a Faraday error for an error object without a type and message" do
+      stub_request(:post, url).to_return(
+        status: 500,
+        body: {error: {code: 500}}.to_json,
+        headers: {"Content-Type" => "application/json"}
+      )
+
+      expect { seam.devices.list }.to raise_error(Faraday::ServerError)
+    end
+  end
+end