diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 64fbbb4..b6e6033 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -110,11 +110,11 @@ jobs:
 
             DNS_V4="$(cargo run -q -p proxychains-bin -- -q -f ./ci.e2e.conf python3 -c "import socket;print(socket.getaddrinfo(\"dns-proxychains-e2e.invalid\",443,0,socket.SOCK_STREAM)[0][4][0])" | tr -d "\r\n")"
             echo "dns v4 fake ip: ${DNS_V4}"
-            [[ "${DNS_V4}" == 224.* ]]
+            DNS_V4="${DNS_V4}" python3 -c "import ipaddress, os; ip = ipaddress.ip_address(os.environ['DNS_V4']); assert ip.version == 4 and ip in ipaddress.ip_network('224.0.0.0/8')"
 
             DNS_V6="$(cargo run -q -p proxychains-bin -- -q -f ./ci.e2e.conf python3 -c "import socket;print(socket.getaddrinfo(\"dns-proxychains-e2e.invalid\",443,socket.AF_INET6,socket.SOCK_STREAM)[0][4][0])" | tr -d "\r\n")"
             echo "dns v6 fake ip: ${DNS_V6}"
-            [[ "${DNS_V6}" == ::ffff:224.* ]]
+            DNS_V6="${DNS_V6}" python3 -c "import ipaddress, os; ip = ipaddress.ip_address(os.environ['DNS_V6']); mapped = ip.ipv4_mapped; assert ip.version == 6 and mapped is not None and mapped in ipaddress.ip_network('224.0.0.0/8')"
 
             PROXYCHAINS_TEST_SOCKS5_ADDR=127.0.0.1:19080 \
             PROXYCHAINS_TEST_HTTP_ADDR=127.0.0.1:18080 \