diff --git a/apm-agent-core/src/test/resources/specs/user_agent.feature b/apm-agent-core/src/test/resources/specs/user_agent.feature
new file mode 100644
index 0000000000..411909c085
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+++ b/apm-agent-core/src/test/resources/specs/user_agent.feature
@@ -0,0 +1,19 @@
+Feature: Agent Transport User agent Header
+
+  Scenario: Default user-agent
+    Given an agent
+    When service name is not set
+    When service version is not set
+    Then the User-Agent header matches regex '^apm-agent-[a-z]+/[^ ]*'
+
+  Scenario: User-agent with service name only
+    Given an agent
+    When service name is set to 'myService'
+    When service version is not set
+    Then the User-Agent header matches regex '^apm-agent-[a-z]+/[^ ]* \(myService\)'
+
+  Scenario: User-agent with service name and service version
+    Given an agent
+    When service name is set to 'myService'
+    When service version is set to 'v42'
+    Then the User-Agent header matches regex '^apm-agent-[a-z]+/[^ ]* \(myService v42\)'