diff --git a/test_monitor_tshark.sh b/test_monitor_tshark.sh
index 6bd7f54..b2a0dc8 100755
--- a/test_monitor_tshark.sh
+++ b/test_monitor_tshark.sh
@@ -161,8 +161,13 @@ CAPTURE_OUTPUT=$(tshark -q -r "$TEMP_PCAP" -n -T fields \
     -e radiotap.present \
     2>/dev/null || true)
 
-# Clean up temp file
-rm -f "$TEMP_PCAP"
+# Clean up temp file (unless KEEP_PCAP is set)
+if [ -z "${KEEP_PCAP:-}" ]; then
+    echo "Cleaning up temporary pcap file: $TEMP_PCAP"
+    rm -f "$TEMP_PCAP"
+else
+    echo "Keeping temporary pcap file: $TEMP_PCAP"
+fi
 
 # Force output flush
 sync