diff --git a/tests/net_inet/mpycert.der b/tests/net_inet/mpycert.der
index ac22dcf9e8b88..0b0eabc9bc813 100644
Binary files a/tests/net_inet/mpycert.der and b/tests/net_inet/mpycert.der differ
diff --git a/tests/net_inet/ssl_cert.py b/tests/net_inet/ssl_cert.py
index 83d83e3f8e572..7bb270d5fda7a 100644
--- a/tests/net_inet/ssl_cert.py
+++ b/tests/net_inet/ssl_cert.py
@@ -5,7 +5,7 @@
 # This certificate was obtained from micropython.org using openssl:
 # $ openssl s_client -showcerts -connect micropython.org:443 </dev/null 2>/dev/null
 # The certificate is from Let's Encrypt:
-# 1 s:C=US, O=Let's Encrypt, CN=R10
+# 1 s:C=US, O=Let's Encrypt, CN=R11
 #   i:C=US, O=Internet Security Research Group, CN=ISRG Root X1
 #   a:PKEY: RSA, 2048 (bit); sigalg: sha256WithRSAEncryption
 #   v:NotBefore: Mar 13 00:00:00 2024 GMT; NotAfter: Mar 12 23:59:59 2027 GMT
@@ -14,39 +14,39 @@
 # Then convert to hex format using: for i in range(0,len(data),40):print(data[i:i+40].hex())
 
 ca_cert_chain = bytes.fromhex(
-    "30820505308202eda00302010202104ba85293f79a2fa273064ba8048d75d0300d06092a864886f7"
-    "0d01010b0500304f310b300906035504061302555331293027060355040a1320496e7465726e6574"
-    "2053656375726974792052657365617263682047726f7570311530130603550403130c4953524720"
-    "526f6f74205831301e170d3234303331333030303030305a170d3237303331323233353935395a30"
-    "33310b300906035504061302555331163014060355040a130d4c6574277320456e6372797074310c"
-    "300a0603550403130352313030820122300d06092a864886f70d01010105000382010f003082010a"
-    "0282010100cf57e5e6c45412edb447fec92758764650288c1d3e88df059dd5b51829bdddb55abffa"
-    "f6cea3beaf00214b625a5a3c012fc55803f689ff8e1143ebc1b5e01407968f6f1fd7e7ba81390975"
-    "65b7c2af185b372628e7a3f4072b6d1affab58bc95ae40ffe9cb57c4b55b7f780d1861bc17e754c6"
-    "bb4991cd6e18d18085eea66536bc74eabc504ceafc21f338169394bab0d36b3806cd16127aca5275"
-    "c8ad76b2c29c5d98455c6f617bc62dee3c13528601d957e6381cdf8db51f92919ae74a1ccc45a872"
-    "55f0b0e6a307ecfda71b669e3f488b71847158c93afaef5ef25b442b3c74e78fb247c1076acd9ab7"
-    "0d96f712812651540aec61f6f7f5e2f28ac8950d8d0203010001a381f83081f5300e0603551d0f01"
-    "01ff040403020186301d0603551d250416301406082b0601050507030206082b0601050507030130"
-    "120603551d130101ff040830060101ff020100301d0603551d0e04160414bbbcc347a5e4bca9c6c3"
-    "a4720c108da235e1c8e8301f0603551d2304183016801479b459e67bb6e5e40173800888c81a58f6"
-    "e99b6e303206082b0601050507010104263024302206082b060105050730028616687474703a2f2f"
-    "78312e692e6c656e63722e6f72672f30130603551d20040c300a3008060667810c01020130270603"
-    "551d1f0420301e301ca01aa0188616687474703a2f2f78312e632e6c656e63722e6f72672f300d06"
-    "092a864886f70d01010b0500038202010092b1e74137eb799d81e6cde225e13a20e9904495a3815c"
-    "cfc35dfdbda070d5b19628220bd2f228cf0ce7d4e6438c24221dc14292d109af9f4bf4c8704f2016"
-    "b15add01f61ff81f616b1427b0728d63aeeee2ce4bcf37ddbba3d4cde7ad50adbdbfe3ec3e623670"
-    "9931a7e88dddea62e212aef59cd43d2c0caad09c79beea3d5c446e9631635a7dd67e4f24a04b057f"
-    "5e6fd2d4ea5f334b13d657b6cade51b85da3098274fdc7789eb3b9ac16da4a2b96c3b68b628ff974"
-    "19a29e03dee96f9bb00fd2a05af6855cc204b7c8d54e32c4bf045dbc29f6f7818f0c5d3c53c94090"
-    "8bfbb60865b9a421d509e51384843782ce1028fc76c206257a46524dda5372a4273f6270acbe6948"
-    "00fb670fdb5ba1e8d703212dd7c9f69942398343df770a1208f125d6ba9419541888a5c58ee11a99"
-    "93796bec1cf93140b0cc3200df9f5ee7b492ab9082918d0de01e95ba593b2e4b5fc2b74635523906"
-    "c0bdaaac52c122a0449799f70ca021a7a16c714716170168c0caa62665047cb3aec9e79455c26f9b"
-    "3c1ca9f92ec5201af076e0beec18d64fd825fb7611e8bfe6210fe8e8ccb5b6a7d5b8f79f41cf6122"
-    "466a83b668972e7cea4e95db23eb2ec82b2884a460e949f4442e3bf9ca625701e25d9016f9c9fc7a"
-    "23488ea6d58172f128fa5dcefbed4e738f942ed241949899dba7af705ff5befb0220bf66276cb4ad"
-    "fa75120b2b3ece039e"
+    "30820506308202eea0030201020211008a7d3e13d62f30ef2386bd29076b34f8300d06092a864886"
+    "f70d01010b0500304f310b300906035504061302555331293027060355040a1320496e7465726e65"
+    "742053656375726974792052657365617263682047726f7570311530130603550403130c49535247"
+    "20526f6f74205831301e170d3234303331333030303030305a170d3237303331323233353935395a"
+    "3033310b300906035504061302555331163014060355040a130d4c6574277320456e637279707431"
+    "0c300a0603550403130352313130820122300d06092a864886f70d01010105000382010f00308201"
+    "0a0282010100ba87bc5c1b0039cbca0acdd46710f9013ca54ea561cb26ca52fb1501b7b928f5281e"
+    "ed27b324183967090c08ece03ab03b770ebdf3e53954410c4eae41d69974de51dbef7bff58bda8b7"
+    "13f6de31d5f272c9726a0b8374959c4600641499f3b1d922d9cda892aa1c267a3ffeef58057b0895"
+    "81db710f8efbe33109bb09be504d5f8f91763d5a9d9e83f2e9c466b3e106664348188065a037189a"
+    "9b843297b1b2bdc4f815009d2788fbe26317966c9b27674bc4db285e69c279f0495ce02450e1c4bc"
+    "a105ac7b406d00b4c2413fa758b82fc55c9ba5bb099ef1feebb08539fda80aef45c478eb652ac2cf"
+    "5f3cdee35c4d1bf70b272baa0b4277534f796a1d87d90203010001a381f83081f5300e0603551d0f"
+    "0101ff040403020186301d0603551d250416301406082b0601050507030206082b06010505070301"
+    "30120603551d130101ff040830060101ff020100301d0603551d0e04160414c5cf46a4eaf4c3c07a"
+    "6c95c42db05e922f26e3b9301f0603551d2304183016801479b459e67bb6e5e40173800888c81a58"
+    "f6e99b6e303206082b0601050507010104263024302206082b060105050730028616687474703a2f"
+    "2f78312e692e6c656e63722e6f72672f30130603551d20040c300a3008060667810c010201302706"
+    "03551d1f0420301e301ca01aa0188616687474703a2f2f78312e632e6c656e63722e6f72672f300d"
+    "06092a864886f70d01010b050003820201004ee2895d0a031c9038d0f51ff9715cf8c38fb237887a"
+    "6fb0251fedbeb7d886068ee90984cd72bf81f3fccacf5348edbdf66942d4a5113e35c813b2921d05"
+    "5fea2ed4d8f849c3adf599969cef26d8e1b4240b48204dfcd354b4a9c621c8e1361bff77642917b9"
+    "f04bef5deacd79d0bf90bfbe23b290da4aa9483174a9440be1e2f62d8371a4757bd294c10519461c"
+    "b98ff3c47448252a0de5f5db43e2db939bb919b41f2fdf6a0e8f31d3630fbb29dcdd662c3fb01b67"
+    "51f8413ce44db9acb8a49c6663f5ab85231dcc53b6ab71aedcc50171da36ee0a182a32fd09317c8f"
+    "f673e79c9cb54a156a77825acfda8d45fe1f2a6405303e73c2c60cb9d63b634aab4603fe99c04640"
+    "276063df503a0747d8154a9fea471f995a08620cb66c33084dd738ed482d2e0568ae805def4cdcd8"
+    "20415f68f1bb5acde30eb00c31879b43de4943e1c8043fd13c1b87453069a8a9720e79121c31d83e"
+    "2357dda74fa0f01c81d1771f6fd6d2b9a8b3031681394b9f55aed26ae4b3bfeaa5d59f4ba3c9d63b"
+    "72f34af654ab0cfc38f76080df6e35ca75a154e42fbc6e17c91aa537b5a29abaecf4c075464f77a8"
+    "e8595691662d6ede2981d6a697055e6445be2cceea644244b0c34fadf0b4dc03ca999b098295820d"
+    "638a66f91972f8d5b98910e289980935f9a21cbe92732374e99d1fd73b4a9a845810c2f3a7e235ec"
+    "7e3b45ce3046526bc0c0"
 )
 
 
diff --git a/tests/net_inet/test_sslcontext_client.py b/tests/net_inet/test_sslcontext_client.py
index 119a42721fa3f..0c83abb733378 100644
--- a/tests/net_inet/test_sslcontext_client.py
+++ b/tests/net_inet/test_sslcontext_client.py
@@ -5,7 +5,7 @@
 # This certificate was obtained from micropython.org using openssl:
 # $ openssl s_client -showcerts -connect micropython.org:443 </dev/null 2>/dev/null
 # The certificate is from Let's Encrypt:
-# 1 s:C=US, O=Let's Encrypt, CN=R10
+# 1 s:C=US, O=Let's Encrypt, CN=R11
 #   i:C=US, O=Internet Security Research Group, CN=ISRG Root X1
 #   a:PKEY: RSA, 2048 (bit); sigalg: sha256WithRSAEncryption
 #   v:NotBefore: Mar 13 00:00:00 2024 GMT; NotAfter: Mar 12 23:59:59 2027 GMT

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