diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index da1fa01..3dcef4d 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -10,3 +10,4 @@ require 'rubella'
 require 'rubella/storage'
 require 'rubella/input/base'
 require 'rubella/input/json'
+require 'rubella/weighting/base'
diff --git a/spec/unit/rubella/weighting/base/buckets_eql_spec.rb b/spec/unit/rubella/weighting/base/buckets_eql_spec.rb
new file mode 100644
index 0000000..f1d3f56
--- /dev/null
+++ b/spec/unit/rubella/weighting/base/buckets_eql_spec.rb
@@ -0,0 +1,28 @@
+require 'spec_helper'
+
+describe Rubella::Weighting::Base, '.buckets=' do
+
+  it "uses the given value" do
+    weighting = Rubella::Weighting::Base.new
+
+    weighting.buckets = 5
+
+    expect(weighting.buckets).to eq(5)
+  end
+
+  it "accepts one of 1, 2, 5, 10, 20, 50" do
+    weighting = Rubella::Weighting::Base.new
+
+    [1, 2, 5, 10, 20, 50].each do |amount|
+      weighting.buckets = amount
+      expect(weighting.buckets).to eq(amount)
+    end
+  end
+
+  it "throws an ArgumentError if the value is not 1, 2, 5, 10, 20, 50" do
+    weighting = Rubella::Weighting::Base.new
+
+    expect{ weighting.buckets = 7 }.to raise_error(ArgumentError)
+  end
+
+end
diff --git a/spec/unit/rubella/weighting/base/buckets_spec.rb b/spec/unit/rubella/weighting/base/buckets_spec.rb
new file mode 100644
index 0000000..8df7ff9
--- /dev/null
+++ b/spec/unit/rubella/weighting/base/buckets_spec.rb
@@ -0,0 +1,11 @@
+require 'spec_helper'
+
+describe Rubella::Weighting::Base, '.buckets' do  
+  
+  it "returns the current amount of buckets" do
+    weighting = Rubella::Weighting::Base.new 20
+
+    expect(weighting.buckets).to eq(20)
+  end
+
+end
diff --git a/spec/unit/rubella/weighting/base/new_spec.rb b/spec/unit/rubella/weighting/base/new_spec.rb
new file mode 100644
index 0000000..159b6bf
--- /dev/null
+++ b/spec/unit/rubella/weighting/base/new_spec.rb
@@ -0,0 +1,23 @@
+require 'spec_helper'
+
+describe Rubella::Weighting::Base, '.new' do
+
+  it "creates a new Weighting instance" do
+    weighting = Rubella::Weighting::Base.new
+
+    expect(weighting).to be_instance_of(Rubella::Weighting::Base)
+  end
+
+  it "uses 10 buckets by default" do
+    weighting = Rubella::Weighting::Base.new
+
+    expect(weighting.buckets).to eq(10)
+  end
+
+  it "uses the given number of buckets" do
+    weighting = Rubella::Weighting::Base.new 5
+
+    expect(weighting.buckets).to eq(5)
+  end
+  
+end
diff --git a/spec/unit/rubella/weighting/base/parse_spec.rb b/spec/unit/rubella/weighting/base/parse_spec.rb
new file mode 100644
index 0000000..03ae1e5
--- /dev/null
+++ b/spec/unit/rubella/weighting/base/parse_spec.rb
@@ -0,0 +1,11 @@
+require 'spec_helper'
+
+describe Rubella::Weighting::Base, '.parse' do
+  
+  it "raises NotImplementedError" do
+    weighting = Rubella::Weighting::Base.new
+
+    expect{ weighting.parse(nil) }.to raise_error(NotImplementedError)
+  end
+
+end
diff --git a/spec/unit/rubella/weighting/base/steps_spec.rb b/spec/unit/rubella/weighting/base/steps_spec.rb
new file mode 100644
index 0000000..68e25ec
--- /dev/null
+++ b/spec/unit/rubella/weighting/base/steps_spec.rb
@@ -0,0 +1,19 @@
+require 'spec_helper'
+
+describe Rubella::Weighting::Base, '@steps' do
+
+  it "is always buckets/100" do
+    weighting = Rubella::Weighting::Implementation.new
+
+    weighting.buckets = 20
+    expect(weighting.steps).to eq(5)
+
+    weighting.buckets = 10
+    expect(weighting.steps).to eq(10)
+  end
+  
+end
+
+class Rubella::Weighting::Implementation < Rubella::Weighting::Base
+  attr_reader :steps
+end