diff --git a/lib/faraday_middleware/response/parse_marshal.rb b/lib/faraday_middleware/response/parse_marshal.rb
index 98e2e018..e5f3cd18 100644
--- a/lib/faraday_middleware/response/parse_marshal.rb
+++ b/lib/faraday_middleware/response/parse_marshal.rb
@@ -4,7 +4,7 @@ module FaradayMiddleware
   # Public: Restore marshalled Ruby objects in response bodies.
   class ParseMarshal < ResponseMiddleware
     define_parser do |body|
-      ::Marshal.load body unless body.empty?
+      ::Marshal.load(body) unless body.empty?
     end
   end
 end
diff --git a/lib/faraday_middleware/response/parse_xml.rb b/lib/faraday_middleware/response/parse_xml.rb
index 231ff0cd..db6b2f35 100644
--- a/lib/faraday_middleware/response/parse_xml.rb
+++ b/lib/faraday_middleware/response/parse_xml.rb
@@ -5,8 +5,8 @@ module FaradayMiddleware
   class ParseXml < ResponseMiddleware
     dependency 'multi_xml'
 
-    define_parser do |body|
-      ::MultiXml.parse(body)
+    define_parser do |body, parser_options|
+      ::MultiXml.parse(body, parser_options || {})
     end
   end
 end
diff --git a/lib/faraday_middleware/response/parse_yaml.rb b/lib/faraday_middleware/response/parse_yaml.rb
index 8564fa8f..8c1a277a 100644
--- a/lib/faraday_middleware/response/parse_yaml.rb
+++ b/lib/faraday_middleware/response/parse_yaml.rb
@@ -26,8 +26,12 @@ module FaradayMiddleware
   class ParseYaml < ResponseMiddleware
     dependency 'safe_yaml/load'
 
-    define_parser do |body|
-      SafeYAML.load body
+    define_parser do |body, parser_options|
+      if SafeYAML::YAML_ENGINE == 'psych'
+        SafeYAML.load(body, nil, parser_options || {})
+      else
+        SafeYAML.load(body, parser_options || {})
+      end
     end
   end
 end
diff --git a/spec/unit/oauth2_spec.rb b/spec/unit/oauth2_spec.rb
index 9443f970..9a1fa8d4 100644
--- a/spec/unit/oauth2_spec.rb
+++ b/spec/unit/oauth2_spec.rb
@@ -27,7 +27,7 @@ def make_app
   end
 
   context "no token configured" do
-    let(:options) { nil }
+    let(:options) { [nil, {:token_type => :param}] }
 
     it "doesn't add params" do
       request = perform(:q => 'hello')
@@ -45,7 +45,7 @@ def make_app
     end
 
     context "bearer token type configured" do
-      let(:options) { [nil, {:token_type => 'bearer'}] }
+      let(:options) { [nil, {:token_type => :bearer}] }
 
       it "doesn't add headers" do
         expect(auth_header(perform)).to be_nil
@@ -59,7 +59,7 @@ def make_app
   end
 
   context "default token configured" do
-    let(:options) { 'XYZ' }
+    let(:options) { ['XYZ', {:token_type => :param}] }
 
     it "adds token param" do
       expect(query_params(perform(:q => 'hello'))).to eq('q' => 'hello', 'access_token' => 'XYZ')
@@ -82,7 +82,7 @@ def make_app
     end
 
     context "bearer token type configured" do
-      let(:options) { ['XYZ', {:token_type => 'bearer'}] }
+      let(:options) { ['XYZ', {:token_type => :bearer}] }
 
       it "adds token header" do
         expect(auth_header(perform)).to eq(%(Bearer XYZ))
@@ -101,7 +101,7 @@ def make_app
   end
 
   context "existing Authorization header" do
-    let(:options) { 'XYZ' }
+    let(:options) { ['XYZ', {:token_type => :param}] }
     subject { perform({:q => 'hello'}, 'Authorization' => 'custom') }
 
     it "adds token param" do
@@ -113,7 +113,7 @@ def make_app
     end
 
     context "bearer token type configured" do
-      let(:options) { ['XYZ', {:token_type => 'bearer'}] }
+      let(:options) { ['XYZ', {:token_type => :bearer}] }
       subject { perform({:q => 'hello'}, 'Authorization' => 'custom') }
 
       it "doesn't override existing header" do
@@ -123,7 +123,7 @@ def make_app
   end
 
   context "custom param name configured" do
-    let(:options) { ['XYZ', {:param_name => :oauth}] }
+    let(:options) { ['XYZ', {:token_type => :param, :param_name => :oauth}] }
 
     it "adds token param" do
       expect(query_params(perform)).to eq('oauth' => 'XYZ')
@@ -137,7 +137,7 @@ def make_app
   end
 
   context "options without token configuration" do
-    let(:options) { [{:param_name => :oauth}] }
+    let(:options) { [{:token_type => :param, :param_name => :oauth}] }
 
     it "doesn't add param" do
       expect(query_params(perform)).to be_empty
@@ -149,7 +149,7 @@ def make_app
   end
 
   context "invalid param name configured" do
-    let(:options) { ['XYZ', {:param_name => nil}] }
+    let(:options) { ['XYZ', {:token_type => :param, :param_name => nil}] }
 
     it "raises error" do
       expect{ make_app }.to raise_error(ArgumentError, ":param_name can't be blank")
diff --git a/spec/unit/parse_json_spec.rb b/spec/unit/parse_json_spec.rb
index baa1edd4..5d0ce327 100644
--- a/spec/unit/parse_json_spec.rb
+++ b/spec/unit/parse_json_spec.rb
@@ -121,7 +121,7 @@
 
   context "JSON options" do
     let(:body) { '{"a": 1}' }
-    let(:result) { {} }
+    let(:result) { {a: 1} }
     let(:options) do
       {
         :parser_options => {
@@ -131,12 +131,12 @@
     end
 
     it "passes relevant options to JSON parse" do
-      allow(::JSON).to receive(:parse)
+      expect(::JSON).to receive(:parse)
         .with(body, options[:parser_options])
         .and_return(result)
 
       response = process(body)
-      expect(response.body).to be(result)
+      expect(response.body).to eq(result)
     end
   end
 end
diff --git a/spec/unit/parse_xml_spec.rb b/spec/unit/parse_xml_spec.rb
index b9bdd415..6915ae31 100644
--- a/spec/unit/parse_xml_spec.rb
+++ b/spec/unit/parse_xml_spec.rb
@@ -68,4 +68,23 @@
       expect{ process(data) }.to raise_error(Faraday::Error::ParsingError)
     end
   end
+
+  context "MultiXml options" do
+    let(:options) do
+      {
+        :parser_options => {
+          :symbolize_names => true
+        }
+      }
+    end
+
+    it "passes relevant options to MultiXml parse" do
+      expect(::MultiXml).to receive(:parse)
+                         .with(xml, options[:parser_options])
+                         .and_return(user)
+
+      response = process(xml)
+      expect(response.body).to be(user)
+    end
+  end
 end
diff --git a/spec/unit/parse_yaml_spec.rb b/spec/unit/parse_yaml_spec.rb
index b034aab7..4895bac0 100644
--- a/spec/unit/parse_yaml_spec.rb
+++ b/spec/unit/parse_yaml_spec.rb
@@ -50,4 +50,25 @@
   it "chokes on invalid yaml" do
     expect{ process('{!') }.to raise_error(Faraday::Error::ParsingError)
   end
+
+  context "SafeYAML options" do
+    let(:body) { 'a: 1' }
+    let(:result) { {a: 1} }
+    let(:options) do
+      {
+        :parser_options => {
+          :symbolize_names => true
+        }
+      }
+    end
+
+    it "passes relevant options to SafeYAML load" do
+      expect(::SafeYAML).to receive(:load)
+                         .with(body, nil, options[:parser_options])
+                         .and_return(result)
+
+      response = process(body)
+      expect(response.body).to be(result)
+    end
+  end
 end