diff --git a/package-lock.json b/package-lock.json
index 2a6274f8..286aa46e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1544,12 +1544,74 @@
       }
     },
     "@relaycorp/relaynet-testing": {
-      "version": "2.2.2",
-      "resolved": "https://registry.npmjs.org/@relaycorp/relaynet-testing/-/relaynet-testing-2.2.2.tgz",
-      "integrity": "sha512-KlsVWLbHbeFGDIk8uSMaY9/HYMT7Y+wmNNnQCaobvh0QnZbdhrmUHUe//65jNU4crKleCM6KQUEiDSymmZO5Qw==",
+      "version": "2.2.4",
+      "resolved": "https://registry.npmjs.org/@relaycorp/relaynet-testing/-/relaynet-testing-2.2.4.tgz",
+      "integrity": "sha512-ntWEQ0kgsE1TvtSq/35rMBkOYyuSBQdlEnbxOvTjsD31GNTsMSAO1phigy+zy2c4h+MpMSA2vnH8rikxFC7qPQ==",
       "dev": true,
       "requires": {
-        "@relaycorp/relaynet-core": "^1.60.0"
+        "@relaycorp/relaynet-core": "^1.71.0"
+      },
+      "dependencies": {
+        "@peculiar/webcrypto": {
+          "version": "1.3.2",
+          "resolved": "https://registry.npmjs.org/@peculiar/webcrypto/-/webcrypto-1.3.2.tgz",
+          "integrity": "sha512-oUgNj+8oT7uROEMEpZZ3U+kZjyxj1KXuvA8P5kiMUveTya9eyS8KTqu/dzdEtYC3u7dvjknVz+0sUfkWOBHfQg==",
+          "dev": true,
+          "requires": {
+            "@peculiar/asn1-schema": "^2.0.44",
+            "@peculiar/json-schema": "^1.1.12",
+            "pvtsutils": "^1.2.2",
+            "tslib": "^2.3.1",
+            "webcrypto-core": "^1.7.1"
+          }
+        },
+        "@relaycorp/relaynet-core": {
+          "version": "1.72.1",
+          "resolved": "https://registry.npmjs.org/@relaycorp/relaynet-core/-/relaynet-core-1.72.1.tgz",
+          "integrity": "sha512-xipeYez+IdJo3bx1Yi+SjC+49glqbj7rg8takDMeu5hgDE031LyEboluEq3VMnMrCg3lJurjgPh8IGnambUaYg==",
+          "dev": true,
+          "requires": {
+            "@peculiar/webcrypto": "^1.3.2",
+            "@stablelib/aes-kw": "^1.0.1",
+            "@types/verror": "^1.10.5",
+            "asn1js": "^2.2.0",
+            "buffer-to-arraybuffer": "0.0.6",
+            "date-fns": "^2.28.0",
+            "dohdec": "^3.1.0",
+            "is-valid-domain": "^0.1.6",
+            "moment": "^2.29.1",
+            "pkijs": "^2.3.0",
+            "smart-buffer": "^4.2.0",
+            "uuid4": "^2.0.2",
+            "verror": "^1.10.1",
+            "webcrypto-core": "^1.7.1"
+          }
+        },
+        "pkijs": {
+          "version": "2.3.0",
+          "resolved": "https://registry.npmjs.org/pkijs/-/pkijs-2.3.0.tgz",
+          "integrity": "sha512-MYg9B0TTOCNDQPIMfTHdPEbldL+tt34u9/XYBwxnhTrbX2g4vfO2l5pNAAVnfXWLAsAbDUzEVsYncCYLwkr8OQ==",
+          "dev": true,
+          "requires": {
+            "asn1js": "^2.1.1",
+            "bytestreamjs": "^1.0.29",
+            "pvutils": "^1.1.3"
+          }
+        },
+        "webcrypto-core": {
+          "version": "1.7.1",
+          "resolved": "https://registry.npmjs.org/webcrypto-core/-/webcrypto-core-1.7.1.tgz",
+          "integrity": "sha512-Gw2zLzYSJ7Imp5lLDu3CcWB5oTTACMDEE2PjoLfttGgIhd7BfackBdVgEzd9ZM/i65gpNq0+IelL0JZ48QwzNg==",
+          "dev": true,
+          "requires": {
+            "@peculiar/asn1-schema": "^2.0.44",
+            "@peculiar/json-schema": "^1.1.12",
+            "@types/web": "^0.0.55",
+            "asn1js": "^2.2.0",
+            "pvtsutils": "^1.2.2",
+            "tslib": "^2.3.1"
+          }
+        }
       }
     },
     "@relaycorp/shared-config": {
@@ -1795,6 +1857,12 @@
       "resolved": "https://registry.npmjs.org/@types/verror/-/verror-1.10.5.tgz",
       "integrity": "sha512-9UjMCHK5GPgQRoNbqdLIAvAy0EInuiqbW0PBMtVP6B5B2HQJlvoJHM+KodPZMEjOa5VkSc+5LH7xy+cUzQdmHw=="
     },
+    "@types/web": {
+      "version": "0.0.55",
+      "resolved": "https://registry.npmjs.org/@types/web/-/web-0.0.55.tgz",
+      "integrity": "sha512-YMH9aZrSJIMRMioCUwrgauI3iS/w2wRFN45Xxm0FE9Tt3hqaqkvOzjDFGsNjyKZzz7GJC0ilb+0tv59ytSUbrQ==",
+      "dev": true
+    },
     "@types/ws": {
       "version": "7.4.7",
       "resolved": "https://registry.npmjs.org/@types/ws/-/ws-7.4.7.tgz",
@@ -2413,6 +2481,12 @@
         "whatwg-url": "^8.0.0"
       }
     },
+    "date-fns": {
+      "version": "2.28.0",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-2.28.0.tgz",
+      "integrity": "sha512-8d35hViGYx/QH0icHYCeLmsLmMUheMmTyV9Fcm6gvNwdw31yXXH+O85sOBJ+OLnLQMKZowvpKb6FgMIQjcpvQw==",
+      "dev": true
+    },
     "debug": {
       "version": "4.3.3",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.3.tgz",
diff --git a/package.json b/package.json
index 7d04a01e..807ed354 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "ws": "^7.5.3"
   },
   "devDependencies": {
-    "@relaycorp/relaynet-testing": "^2.2.2",
+    "@relaycorp/relaynet-testing": "^2.2.4",
     "@relaycorp/shared-config": "^1.6.1",
     "@relaycorp/ws-mock": "^4.2.0",
     "@types/jest": "^27.4.1",