diff --git a/examples/testing/app.rb b/examples/testing/app.rb
new file mode 100644
index 0000000..d6a82c5
--- /dev/null
+++ b/examples/testing/app.rb
@@ -0,0 +1,16 @@
+require 'metrics/provider'
+
+class MyApplication
+	def work
+		# ...
+	end
+	
+	Metrics::Provider(self) do
+		WORK_METRIC = Metrics.metric('my_application.work.count', :counter, description: 'Work counter')
+		
+		def work
+			WORK_METRIC.emit(1)
+			super
+		end
+	end
+end
diff --git a/examples/testing/test.rb b/examples/testing/test.rb
new file mode 100755
index 0000000..b94a0ec
--- /dev/null
+++ b/examples/testing/test.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env sus
+
+ENV['METRICS_BACKEND'] ||= 'metrics/backend/test'
+
+require_relative 'app'
+
+describe MyApplication do
+	it 'should emit metrics' do
+		expect(MyApplication::WORK_METRIC).to receive(:emit).with(1)
+		MyApplication.new.work
+	end
+end
diff --git a/guides/links.yaml b/guides/links.yaml
index 8d9310c..599e569 100644
--- a/guides/links.yaml
+++ b/guides/links.yaml
@@ -1,4 +1,6 @@
 getting-started:
   order: 1
 capture:
-  order: 2
\ No newline at end of file
+  order: 2
+testing:
+  order: 3
diff --git a/guides/testing/readme.md b/guides/testing/readme.md
new file mode 100644
index 0000000..c38b819
--- /dev/null
+++ b/guides/testing/readme.md
@@ -0,0 +1,43 @@
+# Testing
+
+This guide explains how to write assertions in your test suite to validate `metrics` are being emitted correctly.
+
+## Application Code
+
+In your application code, you should emit metrics, e.g.
+
+```ruby
+require 'metrics/provider'
+
+class MyApplication
+	def work
+		# ...
+	end
+	
+	Metrics::Provider(self) do
+		WORK_METRIC = Metrics.metric('my_application.work.count', :counter, description: 'Work counter')
+		
+		def work
+			WORK_METRIC.emit(1)
+			super
+		end
+	end
+end
+```
+
+## Test Code
+
+In your test code, you should assert that the metrics are being emitted correctly, e.g.
+
+```ruby
+ENV['METRICS_BACKEND'] ||= 'metrics/backend/test'
+
+require_relative 'app'
+
+describe MyApplication do
+	it 'should emit metrics' do
+		expect(MyApplication::WORK_METRIC).to receive(:emit).with(1)
+		MyApplication.new.work
+	end
+end
+```