diff --git a/.github/workflows/integration.yaml b/.github/workflows/integration.yaml
index ffc80a4f..1aa9a29c 100644
--- a/.github/workflows/integration.yaml
+++ b/.github/workflows/integration.yaml
@@ -78,7 +78,7 @@ jobs:
        max-parallel: 15
        fail-fast: false
        matrix:
-         python-version: ['3.8', '3.9', '3.10', '3.11', '3.11.1', '3.12', 'pypy-3.9', 'pypy-3.10']
+         python-version: ['3.8', '3.9', '3.10', '3.11', '3.11.1', '3.12', '3.13', 'pypy-3.9', 'pypy-3.10']
          test-type: ['standalone', 'cluster']
          connection-type: ['libvalkey', 'plain']
          protocol-version: ['2','3']
@@ -108,7 +108,7 @@ jobs:
            pip install -r requirements.txt
            pip install -r dev_requirements.txt
            if [ "${{matrix.connection-type}}" == "libvalkey" ]; then
-            pip install "libvalkey>=4.0.0"
+            pip install "libvalkey>=4.0.1"
            fi
            invoke devenv
            if [[ "${{matrix.test-type}}" == "standalone" ]]; then
@@ -168,7 +168,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.11.1', '3.12', 'pypy-3.9', 'pypy-3.10']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.11.1', '3.12', '3.13', 'pypy-3.9', 'pypy-3.10']
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
diff --git a/dockers/stunnel/create_certs.sh b/dockers/stunnel/create_certs.sh
index fa3e22d1..e64bab74 100755
--- a/dockers/stunnel/create_certs.sh
+++ b/dockers/stunnel/create_certs.sh
@@ -2,14 +2,16 @@
 
 set -e
 
-DESTDIR=`dirname "$0"`/keys
+CONFIG_FILE=$(realpath "$(dirname "$0")")/openssl.cnf
+
+DESTDIR=$(dirname "$0")/keys
 test -d ${DESTDIR} || mkdir ${DESTDIR}
 cd ${DESTDIR}
 
 which openssl &>/dev/null
 if [ $? -ne 0 ]; then
-	echo "No openssl binary present, exiting."
-	exit 1
+   echo "No openssl binary present, exiting."
+   exit 1
 fi
 
 openssl genrsa -out ca-key.pem 2048 &>/dev/null
@@ -17,29 +19,39 @@ openssl genrsa -out ca-key.pem 2048 &>/dev/null
 openssl req -new -x509 -nodes -days 365000 \
    -key ca-key.pem \
    -out ca-cert.pem \
-   -subj "/CN=valkey-py-ca" &>/dev/null
+   -config "$CONFIG_FILE" \
+   -extensions v3_ca \
+   -subj "/CN=valkey-py-ca"
 
-openssl req -newkey rsa:2048 -nodes -days 365000 \
+openssl req -newkey rsa:2048 -nodes \
    -keyout server-key.pem \
    -out server-req.pem \
-   -subj "/CN=valkey-py-server" &>/dev/null
+   -config "$CONFIG_FILE" \
+   -extensions v3_req \
+   -subj "/CN=valkey-py-server"
 
 openssl x509 -req -days 365000 -set_serial 01 \
    -in server-req.pem \
    -out server-cert.pem \
    -CA ca-cert.pem \
-   -CAkey ca-key.pem &>/dev/null
+   -CAkey ca-key.pem \
+   -extfile "$CONFIG_FILE" \
+   -extensions v3_req
 
-openssl req -newkey rsa:2048 -nodes -days 365000 \
+openssl req -newkey rsa:2048 -nodes \
    -keyout client-key.pem \
    -out client-req.pem \
-   -subj "/CN=valkey-py-client" &>/dev/null
+   -config "$CONFIG_FILE" \
+   -extensions v3_req \
+   -subj "/CN=valkey-py-client"
 
 openssl x509 -req -days 365000 -set_serial 01 \
    -in client-req.pem \
    -out client-cert.pem \
    -CA ca-cert.pem \
-   -CAkey ca-key.pem &>/dev/null
+   -CAkey ca-key.pem \
+   -extfile "$CONFIG_FILE" \
+   -extensions v3_req
 
 echo "Keys generated in ${DESTDIR}:"
 ls
diff --git a/dockers/stunnel/keys/ca-cert.pem b/dockers/stunnel/keys/ca-cert.pem
index 291cf8e2..a0371e07 100644
--- a/dockers/stunnel/keys/ca-cert.pem
+++ b/dockers/stunnel/keys/ca-cert.pem
@@ -1,19 +1,19 @@
 -----BEGIN CERTIFICATE-----
-MIIDDzCCAfegAwIBAgIUZWdrJiIH/w7FJkNbLTYldxOFEpswDQYJKoZIhvcNAQEL
-BQAwFjEUMBIGA1UEAwwLcmVkaXMtcHktY2EwIBcNMjQwNTA5MDcyMDE4WhgPMzAy
-MzA5MTAwNzIwMThaMBYxFDASBgNVBAMMC3JlZGlzLXB5LWNhMIIBIjANBgkqhkiG
-9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0N9BXLRx3Hxb+ZGuKi5hZabcDWDMEeUGunJG
-F1ijxO9XbNWXxYiR127Le2dMkS3TefU3CNiiYJa7eRxMPAS/wGUp6Bb7LrCoeC3F
-1bfJSYnzC6SwhMq66m51VhqctjAbJxBBAPYqyNBFB2w2BQZOIkKDNPgPJTDNmF/7
-G/5jmAaOPlhm1GITnT+sSTyfr/JcoRRbV9VTVc9VUaTjk6ytHsW+K2sK+uWrjdig
-qdzZDng0gtasTn907QkTDDyR4E/UY9N47aD2Jy5F3XHesy9kEfuppq+A1WYOs8/H
-bXgEL53ncayqDNAgjnid5kHvKJ9wTAPSMDqmupHG0l5ADisahwIDAQABo1MwUTAd
-BgNVHQ4EFgQUWg70hcbq4zibHXAFlZd8mHVEWzowHwYDVR0jBBgwFoAUWg70hcbq
-4zibHXAFlZd8mHVEWzowDwYDVR0TAQH/BAUwAwEB/zANBgkqhkiG9w0BAQsFAAOC
-AQEAe1qupf8GoqCgtzTwFCwmcDygLibX4vI/EfCMOLVZHMgDacDwQbmYPlM+goJT
-Pz8WCklopFcMJ6MSdUGy3g4hjKmJpKttTSuhEd3uZWPZYjhRj2SY8531/aAajg9/
-oezyvlgN/DWXAREG31XWyXLzPU7VLbg99mYB+2+lo2cAciAOCBdIOu6WzqnQax82
-aDSqXIHiTGc/5QYZ6ZIzdVRYiVdddKSxTNKZn9x0hu3L8r2e9ryGLLVKJmZfNZDS
-tXYwiY3fE0EwYViIPiPlmBEXiBhHlC2kAQMFK8Qd4LgX6rGki4luL15GYxxKPQbF
-EtDS9EqM4EdRWZq3SDjOA1zODA==
+MIIC/TCCAeWgAwIBAgIUL0/OSD+P0ZISmuNtnbVNjymQn3wwDQYJKoZIhvcNAQEL
+BQAwFzEVMBMGA1UEAwwMdmFsa2V5LXB5LWNhMCAXDTI0MTEwMTExNTEwMFoYDzMw
+MjQwMzA0MTE1MTAwWjAXMRUwEwYDVQQDDAx2YWxrZXktcHktY2EwggEiMA0GCSqG
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+GX/9xPxG9l0soukgFzANBgkqhkiG9w0BAQsFAAOCAQEALUxF0RNlfpj55H2ku7r6
+aYcKsElzmCdgICxc0jrhvlMT7yv03nt0EOxgx4yWeoCNNKcAhAy9rHh+3pfyXwS7
+RAkwvwTxbqfdXB/mviolrPus0fn8dfC0ZpVSS8DYxS54ziFU0BkZi+odlkBA5PBE
+p6p7kWwx6hc1h+F6abrNEivLe7G5V1Z8sIBNkj9Xj36muDXwNJjCOTq2FyeRRV4H
+C9ztHK4iVhlw2UYHZ8dQjyI/MSPrAyMVbmbglhIdGGoE+JGAixWkB02kjySQ6lxh
+Yt7b7icD4hmHxnXoxoN31wNF4YMePMZmQsuQEjjndSg5Nt+Vbk1Bk/jK88p297vi
+gQ==
 -----END CERTIFICATE-----
diff --git a/dockers/stunnel/keys/ca-key.pem b/dockers/stunnel/keys/ca-key.pem
index 25989d08..715b86c9 100644
--- a/dockers/stunnel/keys/ca-key.pem
+++ b/dockers/stunnel/keys/ca-key.pem
@@ -1,28 +1,28 @@
 -----BEGIN PRIVATE KEY-----
-MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDQ30FctHHcfFv5
-ka4qLmFlptwNYMwR5Qa6ckYXWKPE71ds1ZfFiJHXbst7Z0yRLdN59TcI2KJglrt5
-HEw8BL/AZSnoFvsusKh4LcXVt8lJifMLpLCEyrrqbnVWGpy2MBsnEEEA9irI0EUH
-bDYFBk4iQoM0+A8lMM2YX/sb/mOYBo4+WGbUYhOdP6xJPJ+v8lyhFFtX1VNVz1VR
-pOOTrK0exb4rawr65auN2KCp3NkOeDSC1qxOf3TtCRMMPJHgT9Rj03jtoPYnLkXd
-cd6zL2QR+6mmr4DVZg6zz8dteAQvnedxrKoM0CCOeJ3mQe8on3BMA9IwOqa6kcbS
-XkAOKxqHAgMBAAECggEAB16eh28qcUrF/VPsNDrMtEcjOSmdfv14s6K34bepQkKQ
-8BsdLsVhzUXF0jB+iBojfbMZjQCvwf6vgKzEl9LcZ8+/Sca9zWjtmMfsqgdrsmI2
-psYvIDr9m1XoYpsFGnyEs2fPE1dG19eusn4D7et0svVr0bZK5SyypFoGmcyWUP/M
-kA990HAP7enGzPfpvcpr++Iu3EwWlTY3rjYgh9a7AiFhtj9zDzb9Sg0+4Xl9+8TZ
-dsOvyVsiLu09MZ3vScGg5l+46w+rai+R0IxpgI9QM0sMxAS3AYFY666akrJqn6NU
-S0Q5Q9gZ5V9hHxU7IHfo3weygPQuBW07nbwtX6+JCQKBgQDp7+smBlstRD+1/ZHJ
-KO4Xhi+yrhtkKzViC+gF2vXpZ1GQ+3plRJFzRMFu+LkBgn1jPfg479Tm7CM4W4vM
-cTZo45+hhnpwmLGnltTf3Vw23yXzLdUMenaE2u66PWh3DFPkPHwNqb30QGnx131Q
-Mjnp+2EsBdiZ1d8TFF815ucG7QKBgQDkkiz7I4JgGGCbd51AseFryHgUepsrgeaA
-DIWKEKBOoxOnfWH7JOxtm0oXcpWHLciQ4M6FaTFNv2vNA9Hrz5yApXFwIkKgXVU9
-+zsok4eWdEYmwxZFwjCNYvzsIDGBBwa1PQeps6C5L+nciOE8IZHYW7egAR96prV3
-E4ZQ6aWkwwKBgQCL/nJXIAiiLyx9SVBb9C1/UGLs57ommKDqmrtv/ZeZ5KVwQL3/
-KihstaGYOinkmGVW5XfNAuECjB+Lk2U2pC1uWYFm1SYiiY4O/3lGup57i9CXFT9g
-p0yTtryUITmJvIvbksKeHo05RO7hthYczuHPfwqooJr9fHpxXYiYpiRtBQKBgCp0
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-UZxcDp5q/3uV29/UUF3/CNEhLcVuQLtNOPYRG+S9zMvwo0SNsz4mZJH1nFDSWSNL
-xGXg/Ret9Li4JQTWD47kcheBCVLoTtX1bc66D2LlXDKzN5DRBACxKkAJPUjouhMB
-mPDd05msnfgzPBMHMwsNjg5W
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+8r+9yBZlU1k64S3EIYuK4m7a
 -----END PRIVATE KEY-----
diff --git a/dockers/stunnel/keys/client-cert.pem b/dockers/stunnel/keys/client-cert.pem
index 4db466a4..b761d806 100644
--- a/dockers/stunnel/keys/client-cert.pem
+++ b/dockers/stunnel/keys/client-cert.pem
@@ -1,17 +1,19 @@
 -----BEGIN CERTIFICATE-----
-MIICpjCCAY4CAQEwDQYJKoZIhvcNAQELBQAwFjEUMBIGA1UEAwwLcmVkaXMtcHkt
-Y2EwIBcNMjQwNTA5MDcyMDE5WhgPMzAyMzA5MTAwNzIwMTlaMBoxGDAWBgNVBAMM
-D3JlZGlzLXB5LWNsaWVudDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB
-ALOL3znn2vpX8+VHOlETymeFpw8wsCeOfr9fNhK2o5APIG1NhrGjlu+T7ri/DfrM
-ZmjF+uDSuuUs044o5SFOECNi7yOwpdC9YVWSPQQ5VrsMENqyjIYyq2BC7fLHztAt
-VF1jg0D0zijfFg/4meG2tAOnXLa0O9WUcmwsNlxEgyFzcLvCoTaXpUJbLYJZ2IxW
-BoKgJ85acLlIFQIex053CqmgG/odM8Ib8s1YO+IXI4JsJlJFd9we+zYgZ2TRSZ8L
-v8A8gXM+WTBZpZXNXYv020dW22X7gu+VH4LHcg/6eF0GtkdrFdlQjCEjwGIoVFTu
-fNSp3NvSSYrK/qeJtSNaSw0CAwEAATANBgkqhkiG9w0BAQsFAAOCAQEAdA1QqJn/
-d4rcSO8z2L64d3SdO4wLf78Qznh3vTrIlQ/i0sESRQppw1U57PHSyYtAJzc1MV39
-zgn8KvuQToPQl9UoRWD6mVK8L//xplTPxWJB4BqD/kUc+lA9akBNU8Yhx7KbI5zX
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-gkVdz/nV8LoDeO8QjJXsgsHFD/B+ljWYeEGc5flFe6jWLGOCtgQB5JhImg9lsWFh
-X9i921F9Cqox3Q==
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+MyuXq9ccbuqHe+UZyj8ftt8zYtIILcAnLJlhosIl+VsSWyD1e0WRfR36/tLR8ACf
++nz6aEXaCk07BgryllC0+YvoIVzfXddfD/p6e8/CO2Vxw+df6OT3Z6sZrRnFVK+m
+6PAcuS8VDO7k2y457d8w0A==
 -----END CERTIFICATE-----
diff --git a/dockers/stunnel/keys/client-key.pem b/dockers/stunnel/keys/client-key.pem
index a53cbce0..89a1c670 100644
--- a/dockers/stunnel/keys/client-key.pem
+++ b/dockers/stunnel/keys/client-key.pem
@@ -1,28 +1,28 @@
 -----BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCzi98559r6V/Pl
-RzpRE8pnhacPMLAnjn6/XzYStqOQDyBtTYaxo5bvk+64vw36zGZoxfrg0rrlLNOO
-KOUhThAjYu8jsKXQvWFVkj0EOVa7DBDasoyGMqtgQu3yx87QLVRdY4NA9M4o3xYP
-+JnhtrQDp1y2tDvVlHJsLDZcRIMhc3C7wqE2l6VCWy2CWdiMVgaCoCfOWnC5SBUC
-HsdOdwqpoBv6HTPCG/LNWDviFyOCbCZSRXfcHvs2IGdk0UmfC7/APIFzPlkwWaWV
-zV2L9NtHVttl+4LvlR+Cx3IP+nhdBrZHaxXZUIwhI8BiKFRU7nzUqdzb0kmKyv6n
-ibUjWksNAgMBAAECggEAEelgSZyRwevITxU+AhyhUpaIxgErcabLijfrYw6JXrPD
-nmPfjhUt15TAefnFYUHG7ajikE81ietg54u44AuznHQgO0VCJYLfFPRT1foKZvqb
-K9YoIrMnWaETr+azAR2kjvSAgZhqgLVQtCMu5s+dQcgOfcOZPINkrtnySl4jXtDE
-SOTaj65VjSIkura17rj7nJNUPmDGFwsxwKpeEcXZTfa//ypT/hHVREkRmbSFk5Kw
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+ekKsHsxJCHDmI2QXsu5B9ZM=
 -----END PRIVATE KEY-----
diff --git a/dockers/stunnel/keys/client-req.pem b/dockers/stunnel/keys/client-req.pem
index 62828e19..85cedd4e 100644
--- a/dockers/stunnel/keys/client-req.pem
+++ b/dockers/stunnel/keys/client-req.pem
@@ -1,15 +1,16 @@
 -----BEGIN CERTIFICATE REQUEST-----
-MIICXzCCAUcCAQAwGjEYMBYGA1UEAwwPcmVkaXMtcHktY2xpZW50MIIBIjANBgkq
-hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs4vfOefa+lfz5Uc6URPKZ4WnDzCwJ45+
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+djEFXUcRybmtRcnwHNJXFpSNANfWaSx0oCxi51BN808=
 -----END CERTIFICATE REQUEST-----
diff --git a/dockers/stunnel/keys/server-cert.pem b/dockers/stunnel/keys/server-cert.pem
index c17bf9ca..dc41bb48 100644
--- a/dockers/stunnel/keys/server-cert.pem
+++ b/dockers/stunnel/keys/server-cert.pem
@@ -1,17 +1,19 @@
 -----BEGIN CERTIFICATE-----
-MIICpjCCAY4CAQEwDQYJKoZIhvcNAQELBQAwFjEUMBIGA1UEAwwLcmVkaXMtcHkt
-Y2EwIBcNMjQwNTA5MDcyMDE5WhgPMzAyMzA5MTAwNzIwMTlaMBoxGDAWBgNVBAMM
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-/9hpK3Mhl8VVz0zQwwEfnxCmI/TxpqNw+5lvpit/WvriIAEP9MToWHwYvG24zRrp
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-t2F8EBCShzAJGg==
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+bWhwbV/AcUIgSZC76ZSoJQ==
 -----END CERTIFICATE-----
diff --git a/dockers/stunnel/keys/server-key.pem b/dockers/stunnel/keys/server-key.pem
index 8dd9a1e2..2df2718d 100644
--- a/dockers/stunnel/keys/server-key.pem
+++ b/dockers/stunnel/keys/server-key.pem
@@ -1,28 +1,28 @@
 -----BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDoNeMk7IJmpHkh
-bqrb8uH1da3EoC4hnRiszgbKMrZgmc1fvuSZY4+7rUqSYmDGJBzk2bcqgFcJhf9M
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-+GcaEOo0X/J7SkPFqM6aFITypIIGeJpFyz/S99i/5tkfsNt9BQtiTS+x1Kj1iREV
-bXIoNJRac5m/LLZKtDtHv18=
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+57SzeaNNZwKBgGy7I8+58ZAWIVXcCj1vqQzYPv3hVbc3Z3dM52nueRdUsNnnk6KQ
+OI3OM8dyiIm2UHovJAMkL814/xfaYqLcBqv7AmwV5KhCA9KAI2n4EeuEcvA7lr2W
+ySy5Nb+ZMqxu3jvgVARQAdUDuBTMSUFxAfgSVXj6Hy1q9hZGS9qTgUMRAoGBAIqE
+J064O4cbXdz7IJbOD3WK7D0Z2Zp8uIKPDyaadXR3P9WZ+uuEG+d41QA/iMabngp7
+gVsRoySSCqQ2LCRz2ZK/VarUHPGWi261y6EOCe6+4bs860dbN7tY1h0j/RVUIQAO
+aFBffr29FBX3IW7nblowVG1mN7DauJGwneqCJeM5AoGBAOc6vMhl355zR/5VK2Sb
+PtKrrbpHmJSeqW7wLBNWXNPkFInrf5G8m6oMQISVjqJ+dlP/AKZE2dOqt6+XyK7T
+QWhln1l4+Gbx+o9ig6/nrisSYPIoZXDUht0+GYbCEBK1p/R+8k4CM1FrVLIaufQj
+1wx+hdkof1ICK9gnjBDc/DwL
 -----END PRIVATE KEY-----
diff --git a/dockers/stunnel/keys/server-req.pem b/dockers/stunnel/keys/server-req.pem
index 6d853693..3d082431 100644
--- a/dockers/stunnel/keys/server-req.pem
+++ b/dockers/stunnel/keys/server-req.pem
@@ -1,15 +1,16 @@
 -----BEGIN CERTIFICATE REQUEST-----
-MIICXzCCAUcCAQAwGjEYMBYGA1UEAwwPcmVkaXMtcHktc2VydmVyMIIBIjANBgkq
-hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6DXjJOyCZqR5IW6q2/Lh9XWtxKAuIZ0Y
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+nbOlMZvgLjvAiOqMIoYtGasJnlolb0Fg2yurPIqaisM=
 -----END CERTIFICATE REQUEST-----
diff --git a/dockers/stunnel/openssl.cnf b/dockers/stunnel/openssl.cnf
new file mode 100644
index 00000000..1119d485
--- /dev/null
+++ b/dockers/stunnel/openssl.cnf
@@ -0,0 +1,15 @@
+[ req ]
+distinguished_name = req_distinguished_name
+x509_extensions = v3_ca
+
+[ req_distinguished_name ]
+commonName = valkey.io
+commonName_max = 64
+
+[ v3_ca ]
+basicConstraints = critical, CA:TRUE
+keyUsage = keyCertSign, cRLSign
+
+[ v3_req ]
+basicConstraints = critical, CA:FALSE
+keyUsage = digitalSignature, keyEncipherment
diff --git a/setup.py b/setup.py
index 500272c3..2df4059d 100644
--- a/setup.py
+++ b/setup.py
@@ -52,11 +52,12 @@
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
     ],
     extras_require={
-        "libvalkey": ["libvalkey>=4.0.0"],
+        "libvalkey": ["libvalkey>=4.0.1"],
         "ocsp": ["cryptography>=36.0.1", "pyopenssl==23.2.1", "requests>=2.31.0"],
     },
 )
diff --git a/tests/test_asyncio/test_connect.py b/tests/test_asyncio/test_connect.py
index ac0465dd..dc92b2f1 100644
--- a/tests/test_asyncio/test_connect.py
+++ b/tests/test_asyncio/test_connect.py
@@ -125,7 +125,7 @@ async def test_tcp_ssl_version_mismatch(tcp_address):
             tcp_address,
             certfile=certfile,
             keyfile=keyfile,
-            ssl_version=ssl.TLSVersion.TLSv1_2,
+            maximum_ssl_version=ssl.TLSVersion.TLSv1_2,
         )
     await conn.disconnect()
 
@@ -135,7 +135,8 @@ async def _assert_connect(
     server_address,
     certfile=None,
     keyfile=None,
-    ssl_version=None,
+    minimum_ssl_version=ssl.TLSVersion.TLSv1_2,
+    maximum_ssl_version=ssl.TLSVersion.TLSv1_3,
 ):
     stop_event = asyncio.Event()
     finished = asyncio.Event()
@@ -153,9 +154,8 @@ async def _handler(reader, writer):
     elif certfile:
         host, port = server_address
         context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
-        if ssl_version is not None:
-            context.minimum_version = ssl_version
-            context.maximum_version = ssl_version
+        context.minimum_version = minimum_ssl_version
+        context.maximum_version = maximum_ssl_version
         context.load_cert_chain(certfile=certfile, keyfile=keyfile)
         server = await asyncio.start_server(_handler, host=host, port=port, ssl=context)
     else:
diff --git a/tests/test_connect.py b/tests/test_connect.py
index ac91f5a0..cc580008 100644
--- a/tests/test_connect.py
+++ b/tests/test_connect.py
@@ -100,7 +100,6 @@ def test_tcp_ssl_tls12_custom_ciphers(tcp_address, ssl_ciphers):
         tcp_address,
         certfile=certfile,
         keyfile=keyfile,
-        ssl_version=ssl.TLSVersion.TLSv1_2,
     )
 
 
@@ -141,7 +140,7 @@ def test_tcp_ssl_version_mismatch(tcp_address):
             tcp_address,
             certfile=certfile,
             keyfile=keyfile,
-            ssl_version=ssl.TLSVersion.TLSv1_3,
+            maximum_ssl_version=ssl.TLSVersion.TLSv1_2,
         )
 
 
@@ -170,14 +169,16 @@ def __init__(
         *args,
         certfile=None,
         keyfile=None,
-        ssl_version=ssl.TLSVersion.TLSv1,
+        minimum_ssl_version=ssl.TLSVersion.TLSv1_2,
+        maximum_ssl_version=ssl.TLSVersion.TLSv1_3,
         **kw,
     ) -> None:
         self._ready_event = threading.Event()
         self._stop_requested = False
         self._certfile = certfile
         self._keyfile = keyfile
-        self._ssl_version = ssl_version
+        self._minimum_ssl_version = minimum_ssl_version
+        self._maximum_ssl_version = maximum_ssl_version
         super().__init__(*args, **kw)
 
     def service_actions(self):
@@ -199,7 +200,8 @@ def get_request(self):
         newsocket, fromaddr = self.socket.accept()
         sslctx = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
         sslctx.load_cert_chain(self._certfile, self._keyfile)
-        sslctx.minimum_version = self._ssl_version
+        sslctx.minimum_version = self._minimum_ssl_version
+        sslctx.maximum_version = self._maximum_ssl_version
         connstream = sslctx.wrap_socket(
             newsocket,
             server_side=True,