diff --git a/tests/test_context_prompt_cache.py b/tests/test_context_prompt_cache.py
index 38b8d35..fa7f02d 100644
--- a/tests/test_context_prompt_cache.py
+++ b/tests/test_context_prompt_cache.py
@@ -40,7 +40,7 @@ def test_system_prompt_stays_stable_when_clock_changes(tmp_path, monkeypatch) ->
 
 
 def test_runtime_context_is_separate_untrusted_user_message(tmp_path) -> None:
-    """Runtime metadata should be a separate user message before the actual user message."""
+    """Runtime metadata should be merged with the user message."""
     workspace = _make_workspace(tmp_path)
     builder = ContextBuilder(workspace)
 
@@ -55,11 +55,12 @@ def test_runtime_context_is_separate_untrusted_user_message(tmp_path) -> None:
     assert "## Current Session" not in messages[0]["content"]
 
     assert len(messages) == 2
+    # Runtime context is now merged with user message into a single message
     assert messages[-1]["role"] == "user"
-    runtime_content = messages[-1]["content"]
-    assert isinstance(runtime_content, str)
-    assert ContextBuilder._RUNTIME_CONTEXT_TAG in runtime_content
-    assert "Current Time:" in runtime_content
-    assert "Channel: cli" in runtime_content
-    assert "Chat ID: direct" in runtime_content
-    assert "Return exactly: OK" in runtime_content
+    user_content = messages[-1]["content"]
+    assert isinstance(user_content, str)
+    assert ContextBuilder._RUNTIME_CONTEXT_TAG in user_content
+    assert "Current Time:" in user_content
+    assert "Channel: cli" in user_content
+    assert "Chat ID: direct" in user_content
+    assert "Return exactly: OK" in user_content