diff --git a/spec/validations/http_params_spec.rb b/spec/validations/http_params_spec.rb
new file mode 100644
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--- /dev/null
+++ b/spec/validations/http_params_spec.rb
@@ -0,0 +1,228 @@
+require 'spec_helper'
+require 'ronin/app/validations/http_params'
+
+describe Ronin::App::Validations::HTTPParams do
+  describe 'HTTPMethods' do
+    subject { described_class::HTTPMethods }
+
+    it "must map 'COPY' to :copy" do
+      expect(subject['COPY']).to eq(:copy)
+    end
+
+    it "must map 'DELETE' to :delete" do
+      expect(subject['DELETE']).to eq(:delete)
+    end
+
+    it "must map 'GET' to :get" do
+      expect(subject['GET']).to eq(:get)
+    end
+
+    it "must map 'HEAD' to :head" do
+      expect(subject['HEAD']).to eq(:head)
+    end
+
+    it "must map 'LOCK' to :lock" do
+      expect(subject['LOCK']).to eq(:lock)
+    end
+
+    it "must map 'MKCOL' to :mkcol" do
+      expect(subject['MKCOL']).to eq(:mkcol)
+    end
+
+    it "must map 'MOVE' to :move" do
+      expect(subject['MOVE']).to eq(:move)
+    end
+
+    it "must map 'OPTIONS' to :options" do
+      expect(subject['OPTIONS']).to eq(:options)
+    end
+
+    it "must map 'PATCH' to :patch" do
+      expect(subject['PATCH']).to eq(:patch)
+    end
+
+    it "must map 'POST' to :post" do
+      expect(subject['POST']).to eq(:post)
+    end
+
+    it "must map 'PROPFIND' to :propfind" do
+      expect(subject['PROPFIND']).to eq(:propfind)
+    end
+
+    it "must map 'PROPPATCH' to :proppatch" do
+      expect(subject['PROPPATCH']).to eq(:proppatch)
+    end
+
+    it "must map 'PUT' to :put" do
+      expect(subject['PUT']).to eq(:put)
+    end
+
+    it "must map 'TRACE' to :trace" do
+      expect(subject['TRACE']).to eq(:trace)
+    end
+
+    it "must map 'UNLOCK' to :unlock" do
+      expect(subject['UNLOCK']).to eq(:unlock)
+    end
+  end
+
+  describe "Versions" do
+    subject { described_class::Versions }
+
+    it "must map '1.0' to 1" do
+      expect(subject['1.0']).to eq(1)
+    end
+
+    it "must map '1.1' to 1.1" do
+      expect(subject['1.1']).to eq(1.1)
+    end
+
+    it "must map '1.2' to 1.2" do
+      expect(subject['1.2']).to eq(1.2)
+    end
+  end
+
+  describe "VerificationModes" do
+    subject { described_class::VerificationModes }
+
+    it "must map 'none' to :none" do
+      expect(subject['none']).to eq(:none)
+    end
+
+    it "must map 'peer' to :peer" do
+      expect(subject['peer']).to eq(:peer)
+    end
+
+    it "must map 'fail_if_no_peer_cert' to :fail_if_no_peer_cert" do
+      expect(subject['fail_if_no_peer_cert']).to eq(:fail_if_no_peer_cert)
+    end
+  end
+
+  describe "Headers" do
+    subject { described_class::Headers }
+
+    context "when given a String" do
+      it "must parse multiple 'Foo: bar' header lines into a Hash of names and values" do
+        string = <<~HEADERS
+          X-Foo: foo
+          X-Bar: bar
+        HEADERS
+
+        expect(subject[string]).to eq(
+          {
+            'X-Foo' => 'foo',
+            'X-Bar' => 'bar'
+          }
+        )
+      end
+
+      it "must group together repeated header names into an Array of values" do
+        string = <<~HEADERS
+          X-Foo: foo1
+          X-Foo: foo2
+          X-Bar: bar
+        HEADERS
+
+        expect(subject[string]).to eq(
+          {
+            'X-Foo' => ['foo1', 'foo2'],
+            'X-Bar' => 'bar'
+          }
+        )
+      end
+
+      context "when it's empty" do
+        it "must return nil" do
+          expect(subject['']).to eq(nil)
+        end
+      end
+
+      context "when it's whitespace" do
+        it "must return nil" do
+          expect(subject["\n  \n"]).to eq(nil)
+        end
+      end
+    end
+  end
+
+  describe "rules" do
+    let(:method) { 'GET' }
+    let(:url)    { 'https://example.com/' }
+
+    describe ":method" do
+      it "must require an :method key" do
+        result = subject.call({url: url})
+
+        expect(result).to be_failure
+        expect(result.errors[:method]).to eq(["is missing"])
+      end
+    end
+
+    describe ":url" do
+      it "must require an :url key" do
+        result = subject.call({method: 'GET'})
+
+        expect(result).to be_failure
+        expect(result.errors[:url]).to eq(["is missing"])
+      end
+    end
+
+    shared_examples_for "optional value" do |key|
+      let(:params) do
+        {method: method, url: url}
+      end
+
+      it "must coerce an empty value for #{key.inspect} into nil" do
+        result = subject.call(params.merge(key => ""))
+
+        expect(result).to be_success
+        expect(result[key]).to be(nil)
+      end
+    end
+
+    [
+      :body,
+      :headers,
+      :proxy,
+      :user_agent,
+      :user,
+      :password,
+      :cookie
+    ].each do |key|
+      include_context "optional value", key
+    end
+
+    shared_examples_for "optional :ssl value" do |key|
+      let(:params) do
+        {method: method, url: url}
+      end
+
+      it "must coerce an empty value for #{key.inspect} into nil" do
+        result = subject.call(params.merge(ssl: {key => ""}))
+
+        expect(result).to be_success
+        expect(result[:ssl][key]).to be(nil)
+      end
+    end
+
+    [
+      :timeout,
+      :version,
+      :min_version,
+      :max_version,
+      :verify,
+      :verify_depth,
+      :verify_hostname
+    ].each do |key|
+      include_context "optional :ssl value", key
+    end
+  end
+
+  describe ".call" do
+    subject { described_class }
+
+    it "must initialize #{described_class} and call #call" do
+      expect(subject.call({})).to be_kind_of(Dry::Validation::Result)
+    end
+  end
+end