diff --git a/lib/ldp/client.rb b/lib/ldp/client.rb
index fc1f018..011b48c 100644
--- a/lib/ldp/client.rb
+++ b/lib/ldp/client.rb
@@ -8,6 +8,8 @@ class Client
     require 'ldp/client/methods'
     include Ldp::Client::Methods
 
+    ENDPOINT = '/rest'
+
     def initialize *http_client
       initialize_http_client *http_client
     end
diff --git a/lib/ldp/client/methods.rb b/lib/ldp/client/methods.rb
index c423c3f..45ec882 100644
--- a/lib/ldp/client/methods.rb
+++ b/lib/ldp/client/methods.rb
@@ -11,6 +11,14 @@ def initialize_http_client *http_client
     end
   end
 
+  def prefix_path
+    @path ||= @http.url_prefix.path
+  end
+
+  def endpoint_path
+    prefix_path + Ldp::Client::ENDPOINT
+  end
+
   # Get a LDP Resource by URI
   def get url, options = {}
     logger.debug "LDP: GET [#{url}]"
@@ -78,7 +86,7 @@ def check_for_errors resp
     resp.tap do |resp|
       unless resp.success?
         raise Ldp::NotFound.new(resp.body) if resp.status == 404
-        raise Ldp::HttpError.new(resp.body)
+        raise Ldp::HttpError.new("STATUS: #{resp.status} #{resp.body[0, 1000]}...")
       end
     end
   end
diff --git a/lib/ldp/resource/rdf_source.rb b/lib/ldp/resource/rdf_source.rb
index a97345b..55d83d7 100644
--- a/lib/ldp/resource/rdf_source.rb
+++ b/lib/ldp/resource/rdf_source.rb
@@ -21,8 +21,8 @@ def initialize client, subject, graph_or_response = nil
     # @return [RdfSource] the new representation
     def create
       raise "Can't call create on an existing resource" unless new?
-      resp = client.post '', graph.dump(:ttl) do |req|
-        req.headers['Slug'] = subject
+      resp = client.post client.endpoint_path, graph.dump(:ttl) do |req|
+        req.headers['Slug'] = slug if subject
       end
 
       @subject = resp.headers['Location']
@@ -86,5 +86,11 @@ def self.check_for_differences_and_reload_resource old_object
 
       diff
     end
+
+    private
+
+      def slug
+        subject.sub(/^.+#{client.endpoint_path}\//, '')
+      end
   end
 end
diff --git a/spec/lib/ldp/orm/orm_spec.rb b/spec/lib/ldp/orm/orm_spec.rb
index 13c7e7b..3c3fa02 100644
--- a/spec/lib/ldp/orm/orm_spec.rb
+++ b/spec/lib/ldp/orm/orm_spec.rb
@@ -15,7 +15,7 @@
   end
 
   let(:mock_conn) do
-    Faraday.new do |builder|
+    Faraday.new 'http://localhost:8983/fedora' do |builder|
       builder.adapter :test, conn_stubs do |stub|
       end
     end
@@ -39,7 +39,7 @@
   describe "#create" do
     let(:conn_stubs) do
       Faraday::Adapter::Test::Stubs.new do |stub|
-        stub.post("/") { [201]}
+        stub.post("/fedora/rest") { [201]}
       end
     end
     let :test_resource do
@@ -63,7 +63,7 @@
 
     it "should return false if the response was not successful" do
       conn_stubs.instance_variable_get(:@stack)[:put] = [] # erases the stubs for :put
-      conn_stubs.put('/a_resource') {[412]}
+      conn_stubs.put('/a_resource') {[412, nil, 'There was an error']}
       expect(subject.save).to be_false
     end
   end
diff --git a/spec/lib/ldp/resource/rdf_source_spec.rb b/spec/lib/ldp/resource/rdf_source_spec.rb
index ea5b050..c92090e 100644
--- a/spec/lib/ldp/resource/rdf_source_spec.rb
+++ b/spec/lib/ldp/resource/rdf_source_spec.rb
@@ -7,13 +7,12 @@
 
   let(:conn_stubs) do
     Faraday::Adapter::Test::Stubs.new do |stub|
-      # stub.get('/a_resource') {[ 200, {"Link" => "http://www.w3.org/ns/ldp#Resource;rel=\"type\""}, simple_graph ]}
-      stub.post("/") { [201]}
+      stub.post("/fedora/rest") { [201]}
     end
   end
 
   let(:mock_conn) do
-    Faraday.new do |builder|
+    Faraday.new 'http://localhost:8983/fedora' do |builder|
       builder.adapter :test, conn_stubs do |stub|
       end
     end