diff --git a/src/spectator/spec.cr b/src/spectator/spec.cr
index a034332..03f3d51 100644
--- a/src/spectator/spec.cr
+++ b/src/spectator/spec.cr
@@ -1,19 +1,28 @@
 require "./config"
-require "./example"
 require "./example_group"
-require "./test_suite"
+require "./spec/*"
 
 module Spectator
-  # Contains examples to be tested.
+  # Contains examples to be tested and configuration for running them.
   class Spec
+    # Creates the spec.
+    # The *root* is the top-most example group.
+    # All examples in this group and groups nested under are candidates for execution.
+    # The *config* provides settings controlling how tests will be executed.
     def initialize(@root : ExampleGroup, @config : Config)
     end
 
-    def run(filter : ExampleFilter)
-      suite = TestSuite.new(@root, filter)
-      Runner.new(suite, @config).run
+    # Runs all selected examples and returns the results.
+    def run
+      Runner.new(examples, @config).run
+    end
+
+    # Selects and shuffles the examples that should run.
+    private def examples
+      iterator = @config.iterator(@root)
+      iterator.to_a.tap do |examples|
+        @config.shuffle!(examples)
+      end
     end
   end
 end
-
-require "./spec/*"
diff --git a/src/spectator/spec/runner.cr b/src/spectator/spec/runner.cr
index f5ccf8f..69d8940 100644
--- a/src/spectator/spec/runner.cr
+++ b/src/spectator/spec/runner.cr
@@ -2,14 +2,18 @@ require "../example"
 
 module Spectator
   class Spec
+    # Logic for executing examples and collecting results.
     private struct Runner
-      def initialize(@suite : TestSuite, @config : Config)
+      # Creates the runner.
+      # The collection of *examples* should be pre-filtered and shuffled.
+      # This runner will run each example in the order provided.
+      def initialize(@examples : Enumerable(Example), @config : Config)
       end
 
-      # Runs the test suite.
-      # This will run the selected examples
-      # and invoke the formatter to output results.
-      # True will be returned if the test suite ran successfully,
+      # Runs the spec.
+      # This will run the provided examples
+      # and invoke the reporters to communicate results.
+      # True will be returned if the spec ran successfully,
       # or false if there was at least one failure.
       def run : Bool
         # Indicate the suite is starting.
@@ -42,15 +46,6 @@ module Spectator
         end
       end
 
-      # Retrieves an enumerable for the examples to run.
-      # The order of examples is randomized
-      # if specified by the configuration.
-      private def example_order
-        @suite.to_a.tap do |examples|
-          @config.shuffle!(examples)
-        end
-      end
-
       # Runs a single example and returns the result.
       # The formatter is given the example and result information.
       private def run_example(example)
diff --git a/src/spectator/test_suite.cr b/src/spectator/test_suite.cr
deleted file mode 100644
index 2106193..0000000
--- a/src/spectator/test_suite.cr
+++ /dev/null
@@ -1,25 +0,0 @@
-module Spectator
-  # Encapsulates the tests to run and additional properties about them.
-  # Use `#each` to enumerate over all tests in the suite.
-  class TestSuite
-    include Enumerable(Example)
-
-    # Creates the test suite.
-    # The example *group* provided will be run.
-    # The *filter* identifies which examples to run from the *group*.
-    def initialize(@group : ExampleGroup, @filter : ExampleFilter)
-    end
-
-    # Yields each example in the test suite.
-    def each : Nil
-      iterator.each do |example|
-        yield example if @filter.includes?(example)
-      end
-    end
-
-    # Creates an iterator for the example group.
-    private def iterator
-      ExampleIterator.new(@group)
-    end
-  end
-end