diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 67cf502..e73daf1 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -1162,18 +1162,6 @@
             -S "error" \
             -C "error"
 
-requires_config_enabled MBEDTLS_ZLIB_SUPPORT
-run_test    "Default (compression enabled)" \
-            "$P_SRV debug_level=3" \
-            "$P_CLI debug_level=3" \
-            0 \
-            -s "Allocating compression buffer" \
-            -c "Allocating compression buffer" \
-            -s "Record expansion is unknown (compression)" \
-            -c "Record expansion is unknown (compression)" \
-            -S "error" \
-            -C "error"
-
 # Test current time in ServerHello
 requires_config_enabled MBEDTLS_HAVE_TIME
 run_test    "ServerHello contains gmt_unix_time" \
@@ -2498,7 +2486,7 @@
             -s "dumping 'input payload after decrypt' (0 bytes)" \
             -c "0 bytes written in 1 fragments"
 
-run_test    "Default, no Encrypt then MAC: empty application data record" \
+run_test    "Encrypt then MAC: disabled, empty application data record" \
             "$P_SRV auth_mode=none debug_level=4 etm=0" \
             "$P_CLI auth_mode=none etm=0 request_size=0" \
             0 \
@@ -2513,7 +2501,7 @@
             -s "dumping 'input payload after decrypt' (0 bytes)" \
             -c "0 bytes written in 1 fragments"
 
-run_test    "Default, no Encrypt then MAC, DTLS: empty application data record" \
+run_test    "Encrypt then MAC, DTLS: disabled, empty application data record" \
             "$P_SRV auth_mode=none debug_level=4 etm=0 dtls=1" \
             "$P_CLI auth_mode=none etm=0 request_size=0 dtls=1" \
             0 \
@@ -2717,7 +2705,7 @@
 requires_config_enabled MBEDTLS_SSL_SESSION_TICKETS
 run_test    "Session resume using tickets, DTLS: basic" \
             "$P_SRV debug_level=3 dtls=1 tickets=1" \
-            "$P_CLI debug_level=3 dtls=1 tickets=1 reconnect=1" \
+            "$P_CLI debug_level=3 dtls=1 tickets=1 reconnect=1 skip_close_notify=1" \
             0 \
             -c "client hello, adding session ticket extension" \
             -s "found session ticket extension" \
@@ -2733,7 +2721,7 @@
 requires_config_enabled MBEDTLS_SSL_SESSION_TICKETS
 run_test    "Session resume using tickets, DTLS: cache disabled" \
             "$P_SRV debug_level=3 dtls=1 tickets=1 cache_max=0" \
-            "$P_CLI debug_level=3 dtls=1 tickets=1 reconnect=1" \
+            "$P_CLI debug_level=3 dtls=1 tickets=1 reconnect=1 skip_close_notify=1" \
             0 \
             -c "client hello, adding session ticket extension" \
             -s "found session ticket extension" \
@@ -2749,7 +2737,7 @@
 requires_config_enabled MBEDTLS_SSL_SESSION_TICKETS
 run_test    "Session resume using tickets, DTLS: timeout" \
             "$P_SRV debug_level=3 dtls=1 tickets=1 cache_max=0 ticket_timeout=1" \
-            "$P_CLI debug_level=3 dtls=1 tickets=1 reconnect=1 reco_delay=2" \
+            "$P_CLI debug_level=3 dtls=1 tickets=1 reconnect=1 skip_close_notify=1 reco_delay=2" \
             0 \
             -c "client hello, adding session ticket extension" \
             -s "found session ticket extension" \
@@ -2935,7 +2923,7 @@
 requires_config_disabled MBEDTLS_SSL_NO_SESSION_CACHE
 run_test    "Session resume using cache, DTLS: tickets enabled on client" \
             "$P_SRV dtls=1 debug_level=3 tickets=0" \
-            "$P_CLI dtls=1 debug_level=3 tickets=1 reconnect=1" \
+            "$P_CLI dtls=1 debug_level=3 tickets=1 reconnect=1 skip_close_notify=1" \
             0 \
             -c "client hello, adding session ticket extension" \
             -s "found session ticket extension" \
@@ -2952,7 +2940,7 @@
 requires_config_disabled MBEDTLS_SSL_NO_SESSION_CACHE
 run_test    "Session resume using cache, DTLS: tickets enabled on server" \
             "$P_SRV dtls=1 debug_level=3 tickets=1" \
-            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1" \
+            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1 skip_close_notify=1" \
             0 \
             -C "client hello, adding session ticket extension" \
             -S "found session ticket extension" \
@@ -2968,7 +2956,7 @@
 requires_config_disabled MBEDTLS_SSL_NO_SESSION_CACHE
 run_test    "Session resume using cache, DTLS: cache_max=0" \
             "$P_SRV dtls=1 debug_level=3 tickets=0 cache_max=0" \
-            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1" \
+            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1 skip_close_notify=1" \
             0 \
             -S "session successfully restored from cache" \
             -S "session successfully restored from ticket" \
@@ -2979,7 +2967,7 @@
 requires_config_disabled MBEDTLS_SSL_NO_SESSION_CACHE
 run_test    "Session resume using cache, DTLS: cache_max=1" \
             "$P_SRV dtls=1 debug_level=3 tickets=0 cache_max=1" \
-            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1" \
+            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1 skip_close_notify=1" \
             0 \
             -s "session successfully restored from cache" \
             -S "session successfully restored from ticket" \
@@ -2990,7 +2978,7 @@
 requires_config_disabled MBEDTLS_SSL_NO_SESSION_CACHE
 run_test    "Session resume using cache, DTLS: timeout > delay" \
             "$P_SRV dtls=1 debug_level=3 tickets=0" \
-            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1 reco_delay=0" \
+            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1 skip_close_notify=1 reco_delay=0" \
             0 \
             -s "session successfully restored from cache" \
             -S "session successfully restored from ticket" \
@@ -3001,7 +2989,7 @@
 requires_config_disabled MBEDTLS_SSL_NO_SESSION_CACHE
 run_test    "Session resume using cache, DTLS: timeout < delay" \
             "$P_SRV dtls=1 debug_level=3 tickets=0 cache_timeout=1" \
-            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1 reco_delay=2" \
+            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1 skip_close_notify=1 reco_delay=2" \
             0 \
             -S "session successfully restored from cache" \
             -S "session successfully restored from ticket" \
@@ -3012,7 +3000,7 @@
 requires_config_disabled MBEDTLS_SSL_NO_SESSION_CACHE
 run_test    "Session resume using cache, DTLS: no timeout" \
             "$P_SRV dtls=1 debug_level=3 tickets=0 cache_timeout=0" \
-            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1 reco_delay=2" \
+            "$P_CLI dtls=1 debug_level=3 tickets=0 reconnect=1 skip_close_notify=1 reco_delay=2" \
             0 \
             -s "session successfully restored from cache" \
             -S "session successfully restored from ticket" \
@@ -4659,19 +4647,19 @@
 
 run_test    "Event-driven I/O, DTLS: ticket + client auth + resume" \
             "$P_SRV dtls=1 event=1 tickets=1 auth_mode=required" \
-            "$P_CLI dtls=1 event=1 tickets=1 reconnect=1" \
+            "$P_CLI dtls=1 event=1 tickets=1 reconnect=1 skip_close_notify=1" \
             0 \
             -c "Read from server: .* bytes read"
 
 run_test    "Event-driven I/O, DTLS: ticket + resume" \
             "$P_SRV dtls=1 event=1 tickets=1 auth_mode=none" \
-            "$P_CLI dtls=1 event=1 tickets=1 reconnect=1" \
+            "$P_CLI dtls=1 event=1 tickets=1 reconnect=1 skip_close_notify=1" \
             0 \
             -c "Read from server: .* bytes read"
 
 run_test    "Event-driven I/O, DTLS: session-id resume" \
             "$P_SRV dtls=1 event=1 tickets=0 auth_mode=none" \
-            "$P_CLI dtls=1 event=1 tickets=0 reconnect=1" \
+            "$P_CLI dtls=1 event=1 tickets=0 reconnect=1 skip_close_notify=1" \
             0 \
             -c "Read from server: .* bytes read"
 
@@ -4683,7 +4671,7 @@
 run_test    "Event-driven I/O, DTLS: session-id resume, UDP packing" \
             -p "$P_PXY pack=50" \
             "$P_SRV dtls=1 event=1 tickets=0 auth_mode=required" \
-            "$P_CLI dtls=1 event=1 tickets=0 reconnect=1" \
+            "$P_CLI dtls=1 event=1 tickets=0 reconnect=1 skip_close_notify=1" \
             0 \
             -c "Read from server: .* bytes read"
 
@@ -7103,8 +7091,8 @@
 not_with_valgrind # spurious resend
 requires_config_disabled MBEDTLS_SSL_CONF_READ_TIMEOUT
 run_test    "DTLS client reconnect from same port: reference" \
-            "$P_SRV dtls=1 exchanges=2 read_timeout=1000" \
-            "$P_CLI dtls=1 exchanges=2 debug_level=2 hs_timeout=500-1000" \
+            "$P_SRV dtls=1 exchanges=2 read_timeout=20000 hs_timeout=10000-20000" \
+            "$P_CLI dtls=1 exchanges=2 debug_level=2 hs_timeout=10000-20000" \
             0 \
             -C "resend" \
             -S "The operation timed out" \
@@ -7113,8 +7101,8 @@
 not_with_valgrind # spurious resend
 requires_config_disabled MBEDTLS_SSL_CONF_READ_TIMEOUT
 run_test    "DTLS client reconnect from same port: reconnect" \
-            "$P_SRV dtls=1 exchanges=2 read_timeout=1000" \
-            "$P_CLI dtls=1 exchanges=2 debug_level=2 hs_timeout=500-1000 reconnect_hard=1" \
+            "$P_SRV dtls=1 exchanges=2 read_timeout=20000 hs_timeout=10000-20000" \
+            "$P_CLI dtls=1 exchanges=2 debug_level=2 hs_timeout=10000-20000 reconnect_hard=1" \
             0 \
             -C "resend" \
             -S "The operation timed out" \
@@ -7146,6 +7134,14 @@
             -s "The operation timed out" \
             -S "Client initiated reconnection from same port"
 
+run_test    "DTLS client reconnect from same port: attacker-injected" \
+            -p "$P_PXY inject_clihlo=1" \
+            "$P_SRV dtls=1 exchanges=2 debug_level=1" \
+            "$P_CLI dtls=1 exchanges=2" \
+            0 \
+            -s "possible client reconnect from the same port" \
+            -S "Client initiated reconnection from same port"
+
 # Tests for various cases of client authentication with DTLS
 # (focused on handshake flows and message parsing)
 
@@ -7750,7 +7746,7 @@
              ca_file=data_files/test-ca2.crt \
              hs_timeout=10000-60000 \
              force_ciphersuite=TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256 \
-             mtu=1450 reconnect=1 reco_delay=1" \
+             mtu=1450 reconnect=1 skip_close_notify=1 reco_delay=1" \
             0 \
             -S "autoreduction" \
             -s "found fragmented DTLS handshake message" \
@@ -8246,8 +8242,8 @@
 not_with_valgrind # spurious resend due to timeout
 run_test    "DTLS proxy: reference" \
             -p "$P_PXY" \
-            "$P_SRV dtls=1 debug_level=2" \
-            "$P_CLI dtls=1 debug_level=2" \
+            "$P_SRV dtls=1 debug_level=2 hs_timeout=10000-20000" \
+            "$P_CLI dtls=1 debug_level=2 hs_timeout=10000-20000" \
             0 \
             -C "replayed record" \
             -S "replayed record" \
@@ -8264,8 +8260,8 @@
 not_with_valgrind # spurious resend due to timeout
 run_test    "DTLS proxy: duplicate every packet" \
             -p "$P_PXY duplicate=1" \
-            "$P_SRV dtls=1 dgram_packing=0 debug_level=2 anti_replay=1" \
-            "$P_CLI dtls=1 dgram_packing=0 debug_level=2" \
+            "$P_SRV dtls=1 dgram_packing=0 debug_level=2 anti_replay=1 hs_timeout=10000-20000" \
+            "$P_CLI dtls=1 dgram_packing=0 debug_level=2 hs_timeout=10000-20000" \
             0 \
             -c "replayed record" \
             -s "replayed record" \
@@ -8617,7 +8613,7 @@
             "$P_SRV dtls=1 dgram_packing=0 hs_timeout=500-10000 tickets=0 auth_mode=none \
              psk=abc123 debug_level=3" \
             "$P_CLI dtls=1 dgram_packing=0 hs_timeout=500-10000 tickets=0 psk=abc123 \
-             debug_level=3 reconnect=1 read_timeout=1000 max_resend=10 \
+             debug_level=3 reconnect=1 skip_close_notify=1 read_timeout=1000 max_resend=10 \
              force_ciphersuite=TLS-PSK-WITH-AES-128-CCM-8" \
             0 \
             -s "a session has been resumed" \
@@ -8634,7 +8630,7 @@
             "$P_SRV dtls=1 dgram_packing=0 hs_timeout=500-10000 tickets=0 auth_mode=none \
              psk=abc123 debug_level=3 nbio=2" \
             "$P_CLI dtls=1 dgram_packing=0 hs_timeout=500-10000 tickets=0 psk=abc123 \
-             debug_level=3 reconnect=1 read_timeout=1000 max_resend=10 \
+             debug_level=3 reconnect=1 skip_close_notify=1 read_timeout=1000 max_resend=10 \
              force_ciphersuite=TLS-PSK-WITH-AES-128-CCM-8 nbio=2" \
             0 \
             -s "a session has been resumed" \