diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 64d3973..c7758b8 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -2097,13 +2097,28 @@
             -c "found fragmented DTLS handshake message" \
             -C "error"
 
-# Temporary test for ability to use the UDP proxy
+# Tests with UDP proxy emulating unreliable transport
 
-run_test    "DTLS proxy usability test" \
+run_test    "DTLS proxy: reference" \
             -p "$P_PXY" \
             "$P_SRV dtls=1" \
             "$P_CLI dtls=1" \
-            0
+            0 \
+            -c "HTTP/1.0 200 OK"
+
+run_test    "DTLS proxy: some duplication" \
+            -p "$P_PXY duplicate=3" \
+            "$P_SRV dtls=1" \
+            "$P_CLI dtls=1" \
+            0 \
+            -c "HTTP/1.0 200 OK"
+
+run_test    "DTLS proxy: lots of duplication" \
+            -p "$P_PXY duplicate=1" \
+            "$P_SRV dtls=1" \
+            "$P_CLI dtls=1" \
+            0 \
+            -c "HTTP/1.0 200 OK"
 
 # Final report