diff --git a/src/spectator/formatting/components/block.cr b/src/spectator/formatting/components/block.cr
new file mode 100644
index 0000000..19286c8
--- /dev/null
+++ b/src/spectator/formatting/components/block.cr
@@ -0,0 +1,20 @@
+module Spectator::Formatting::Components
+  abstract struct Block
+    private INDENT = 2
+
+    def initialize(*, @indent : Int32 = INDENT)
+    end
+
+    private def indent(amount = INDENT)
+      @indent += amount
+      yield
+      @indent -= amount
+    end
+
+    private def line(io)
+      @indent.times { io << ' ' }
+      yield
+      io.puts
+    end
+  end
+end
diff --git a/src/spectator/formatting/components/comment.cr b/src/spectator/formatting/components/comment.cr
index 75b67df..7405c6e 100644
--- a/src/spectator/formatting/components/comment.cr
+++ b/src/spectator/formatting/components/comment.cr
@@ -1,3 +1,5 @@
+require "colorize"
+
 module Spectator::Formatting::Components
   struct Comment(T)
     private COLOR = :cyan
diff --git a/src/spectator/formatting/components/error_block.cr b/src/spectator/formatting/components/error_block.cr
deleted file mode 100644
index 64650dc..0000000
--- a/src/spectator/formatting/components/error_block.cr
+++ /dev/null
@@ -1,44 +0,0 @@
-require "../../example"
-require "../../error_result"
-require "./comment"
-
-module Spectator::Formatting::Components
-  struct ErrorBlock
-    private INDENT = 2
-
-    def initialize(@example : Example, @result : ErrorResult, @index : Int32)
-    end
-
-    def to_s(io)
-      2.times { io << ' ' }
-      io << @index
-      io << ')'
-      io << ' '
-      io.puts @example
-      indent = INDENT + index_digit_count + 2
-      indent.times { io << ' ' }
-      error = @result.error
-      io << "Error: ".colorize(:red)
-      io.puts error.message
-      io.puts
-      indent.times { io << ' ' }
-      io << error.class
-      io.puts ':'
-      indent += INDENT
-      error.backtrace?.try do |trace|
-        trace.each do |entry|
-          indent.times { io << ' ' }
-          entry = entry.colorize.dim unless entry.starts_with?(/src\/|spec\//)
-          io.puts entry
-        end
-      end
-      indent -= INDENT
-      indent.times { io << ' ' }
-      io.puts Comment.colorize(@example.location) # TODO: Use location of failed expectation.
-    end
-
-    private def index_digit_count
-      (Math.log(@index.to_f + 1) / Math.log(10)).ceil.to_i
-    end
-  end
-end
diff --git a/src/spectator/formatting/components/error_result_block.cr b/src/spectator/formatting/components/error_result_block.cr
new file mode 100644
index 0000000..10d9826
--- /dev/null
+++ b/src/spectator/formatting/components/error_result_block.cr
@@ -0,0 +1,40 @@
+require "colorize"
+require "../../example"
+require "../../error_result"
+require "./result_block"
+
+module Spectator::Formatting::Components
+  struct ErrorResultBlock < ResultBlock
+    def initialize(index : Int32, example : Example, @result : ErrorResult)
+      super(index, example)
+    end
+
+    private def subtitle
+      @result.error.message
+    end
+
+    private def subtitle_label
+      "Error: ".colorize(:red)
+    end
+
+    private def content(io)
+      error = @result.error
+
+      line(io) do
+        io << "#{error.class}: ".colorize(:red)
+        io << error.message
+      end
+
+      error.backtrace?.try do |backtrace|
+        indent { write_backtrace(io, backtrace) }
+      end
+    end
+
+    private def write_backtrace(io, backtrace)
+      backtrace.each do |entry|
+        entry = entry.colorize.dim unless entry.starts_with?(/(src|spec)\//)
+        line(io) { io << entry }
+      end
+    end
+  end
+end
diff --git a/src/spectator/formatting/components/fail_result_block.cr b/src/spectator/formatting/components/fail_result_block.cr
new file mode 100644
index 0000000..9b20a1b
--- /dev/null
+++ b/src/spectator/formatting/components/fail_result_block.cr
@@ -0,0 +1,24 @@
+require "colorize"
+require "../../example"
+require "../../fail_result"
+require "./result_block"
+
+module Spectator::Formatting::Components
+  struct FailResultBlock < ResultBlock
+    def initialize(index : Int32, example : Example, @result : FailResult)
+      super(index, example)
+    end
+
+    private def subtitle
+      @result.error.message
+    end
+
+    private def subtitle_label
+      "Failure: ".colorize(:red)
+    end
+
+    private def content(io)
+      # TODO: Display match data.
+    end
+  end
+end
diff --git a/src/spectator/formatting/components/failure_block.cr b/src/spectator/formatting/components/failure_block.cr
deleted file mode 100644
index 1980ec9..0000000
--- a/src/spectator/formatting/components/failure_block.cr
+++ /dev/null
@@ -1,32 +0,0 @@
-require "../../example"
-require "../../fail_result"
-require "./comment"
-
-module Spectator::Formatting::Components
-  struct FailureBlock
-    private INDENT = 2
-
-    def initialize(@example : Example, @result : FailResult, @index : Int32)
-    end
-
-    def to_s(io)
-      2.times { io << ' ' }
-      io << @index
-      io << ')'
-      io << ' '
-      io.puts @example
-      indent = INDENT + index_digit_count + 2
-      indent.times { io << ' ' }
-      io << "Failure: ".colorize(:red)
-      io.puts @result.error.message
-      io.puts
-      # TODO: Expectation values
-      indent.times { io << ' ' }
-      io.puts Comment.colorize(@example.location) # TODO: Use location of failed expectation.
-    end
-
-    private def index_digit_count
-      (Math.log(@index.to_f + 1) / Math.log(10)).ceil.to_i
-    end
-  end
-end
diff --git a/src/spectator/formatting/components/result_block.cr b/src/spectator/formatting/components/result_block.cr
new file mode 100644
index 0000000..1321b13
--- /dev/null
+++ b/src/spectator/formatting/components/result_block.cr
@@ -0,0 +1,58 @@
+require "../../example"
+require "./block"
+require "./comment"
+
+module Spectator::Formatting::Components
+  abstract struct ResultBlock < Block
+    def initialize(@index : Int32, @example : Example)
+      super()
+    end
+
+    private def title
+      @example
+    end
+
+    private abstract def subtitle
+
+    private abstract def subtitle_label
+
+    def to_s(io)
+      title_line(io)
+      indent(index_digit_count + 2) do
+        subtitle_line(io)
+        io.puts
+        content(io)
+        source_line(io)
+      end
+    end
+
+    private def title_line(io)
+      line(io) do
+        io << @index
+        io << ')'
+        io << ' '
+        io << title
+      end
+    end
+
+    private def subtitle_line(io)
+      line(io) do
+        io << subtitle_label
+        io << subtitle
+      end
+    end
+
+    private def source_line(io)
+      source = if (result = @example.result).responds_to?(:source)
+        result.source
+      else
+        @example.location
+      end
+      line(io) { io << Comment.colorize(source) }
+    end
+
+    private def index_digit_count
+      (Math.log(@index.to_f + 1) / Math::LOG10).ceil.to_i
+    end
+  end
+end
diff --git a/src/spectator/formatting/summary.cr b/src/spectator/formatting/summary.cr
index 7d07353..7dba7f2 100644
--- a/src/spectator/formatting/summary.cr
+++ b/src/spectator/formatting/summary.cr
@@ -38,9 +38,9 @@ module Spectator::Formatting
       io.puts
       examples.each_with_index do |example, index|
         if result = example.result.as?(ErrorResult)
-          io.puts Components::ErrorBlock.new(example, result, index + 1)
+          io.puts Components::ErrorResultBlock.new(index + 1, example, result)
         elsif result = example.result.as?(FailResult)
-          io.puts Components::FailureBlock.new(example, result, index + 1)
+          io.puts Components::FailResultBlock.new(index + 1, example, result)
         end
       end
     end