diff --git a/SignalServiceKit/src/Devices/OWSRecordTranscriptJob.m b/SignalServiceKit/src/Devices/OWSRecordTranscriptJob.m
index c132f3272..72a2177dc 100644
--- a/SignalServiceKit/src/Devices/OWSRecordTranscriptJob.m
+++ b/SignalServiceKit/src/Devices/OWSRecordTranscriptJob.m
@@ -97,6 +97,11 @@ NS_ASSUME_NONNULL_BEGIN
                                                    groupMetaMessage:TSGroupMessageNone
                                                       quotedMessage:transcript.quotedMessage];
 
+    // TODO: When written, desktop didn't yet support sending quotedMessages, so we didn't have a
+    // good way to test the handling of transcripts with a quotedMessage. This assertion can be delete
+    // once we've tested transcripts with quoted messages are processed correctly.
+    OWSAssert(transcript.quotedMessage == nil);
+
     TSQuotedMessage *_Nullable quotedMessage = transcript.quotedMessage;
     if (quotedMessage && quotedMessage.thumbnailAttachmentPointerId) {
         // We weren't able to derive a local thumbnail, so we'll fetch the referenced attachment.