diff --git a/nanobot/channels/msteams.py b/nanobot/channels/msteams.py
index 9a1efe9b7..3a341657f 100644
--- a/nanobot/channels/msteams.py
+++ b/nanobot/channels/msteams.py
@@ -358,17 +358,19 @@ class MSTeamsChannel(BaseChannel):
                 if quoted and reply:
                     return self._format_reply_with_quote(quoted, reply)
 
-        # Observed compact fallback where the relay flattens everything into one line
-        # and appends the literal reply text marker at the end.
+        # Observed compact fallback where the relay flattens quote and reply into
+        # a single line after the synthetic FWDIOC-BOT prefix.
         compact = re.sub(r"\s+", " ", normalized_newlines).strip()
         if compact.startswith("FWDIOC-BOT "):
             compact = compact[len("FWDIOC-BOT ") :].strip()
-
-        marker = " Reply with quote test"
-        if compact.endswith(marker):
-            quoted = compact[: -len(marker)].strip()
-            reply = marker.strip()
-            return self._format_reply_with_quote(quoted, reply)
+            for boundary in (". ", "! ", "? ", "… "):
+                idx = compact.rfind(boundary)
+                if idx == -1:
+                    continue
+                quoted = compact[: idx + 1].strip()
+                reply = compact[idx + len(boundary) :].strip()
+                if quoted and reply and len(reply) <= 160:
+                    return self._format_reply_with_quote(quoted, reply)
 
         return cleaned
 
diff --git a/tests/test_msteams.py b/tests/test_msteams.py
index c75b51f94..3978d8cfb 100644
--- a/tests/test_msteams.py
+++ b/tests/test_msteams.py
@@ -264,6 +264,14 @@ def test_sanitize_inbound_text_structures_live_fwdioc_quote_shape(make_channel):
     )
 
 
+def test_normalize_teams_reply_quote_leaves_plain_text_test_phrase_untouched(make_channel):
+    ch = make_channel()
+
+    text = "Normal message ending with Reply with quote test"
+
+    assert ch._normalize_teams_reply_quote(text) == text
+
+
 def test_sanitize_inbound_text_structures_multiline_fwdioc_quote_shape(make_channel):
     ch = make_channel()