diff --git a/package.json b/package.json
index 079e63de..76c31453 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   },
   "devDependencies": {
     "@oclif/plugin-command-snapshot": "^5.3.34",
-    "@salesforce/cli-plugins-testkit": "^5.3.64",
+    "@salesforce/cli-plugins-testkit": "^5.3.66",
     "@salesforce/dev-scripts": "^13.0.2",
     "@salesforce/plugin-command-reference": "^3.1.132",
     "@salesforce/ts-sinon": "^1.4.36",
diff --git a/yarn.lock b/yarn.lock
index b47249ac..0605263c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1211,12 +1211,12 @@
     "@pnpm/network.ca-file" "^1.0.1"
     config-chain "^1.1.11"
 
-"@salesforce/cli-plugins-testkit@^5.3.64":
-  version "5.3.64"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.3.64.tgz#6c28fefc787f83096cb274e38fc855727ffa13f3"
-  integrity sha512-4jUPow+oOr2Jp3s3QKCS1Aw9qs9AV2sIuk3YvWz9gMd7Y3/wVROG4C5OelfnrClGocxDAOVaCgJrTSoF0VQzUg==
+"@salesforce/cli-plugins-testkit@^5.3.66":
+  version "5.3.66"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.3.66.tgz#918a61e62092495bb9fadd1dee38e281d4e7b334"
+  integrity sha512-xmco8MRlrpPmj2n9LZ8hkp0aWWDXbFDvNzTOC6h/z756PSu+g3ERNsW+HwXiyrirMd7rH7IalKSMcNXgWS/f3w==
   dependencies:
-    "@salesforce/core" "^8.31.2"
+    "@salesforce/core" "^8.32.6"
     "@salesforce/kit" "^3.2.6"
     "@salesforce/ts-types" "^2.0.11"
     "@types/shelljs" "^0.10.0"
@@ -1227,7 +1227,7 @@
     strip-ansi "6.0.1"
     ts-retry-promise "^0.8.1"
 
-"@salesforce/core@^8.23.1", "@salesforce/core@^8.31.2", "@salesforce/core@^8.31.4", "@salesforce/core@^8.32.6":
+"@salesforce/core@^8.23.1", "@salesforce/core@^8.31.4", "@salesforce/core@^8.32.6":
   version "8.32.6"
   resolved "https://registry.yarnpkg.com/@salesforce/core/-/core-8.32.6.tgz#2824dc917888dc040995dfef3a9e83d41fafbdea"
   integrity sha512-ZR973WoqCgi6cR58WhgokbHVZOaADNKHiuM1FAwS5pTLQnC91xYi04i2e/gpAX2AUf7Ya6zjbusYtZNpSyKKAQ==
@@ -1252,32 +1252,7 @@
     ts-retry-promise "^0.8.1"
     zod "^4.1.12"
 
-"@salesforce/core@^9.0.0":
-  version "9.1.2"
-  resolved "https://registry.yarnpkg.com/@salesforce/core/-/core-9.1.2.tgz#c31777c0e74407085557ef8ca15d795d10451a2e"
-  integrity sha512-ezAsmwfmUYSinGtJjqRfgioKXQsVdC0bc+KSJgMSLihysG6osjhkvbGtFqHwhoFs2kLu4evJRDERthsmfEW7nA==
-  dependencies:
-    "@jsforce/jsforce-node" "^3.10.17"
-    "@salesforce/kit" "^4.0.0"
-    "@salesforce/ts-types" "^3.0.0"
-    ajv "^8.18.0"
-    change-case "^4.1.2"
-    fast-levenshtein "^3.0.0"
-    faye "^1.4.1"
-    form-data "^4.0.5"
-    js2xmlparser "^4.0.1"
-    jsonwebtoken "9.0.3"
-    jszip "3.10.1"
-    memfs "4.38.1"
-    pino "^9.7.0"
-    pino-abstract-transport "^1.2.0"
-    pino-pretty "^11.3.0"
-    proper-lockfile "^4.1.2"
-    semver "^7.8.0"
-    ts-retry-promise "^0.8.1"
-    zod "^4.1.12"
-
-"@salesforce/core@^9.1.4":
+"@salesforce/core@^9.0.0", "@salesforce/core@^9.1.4":
   version "9.1.4"
   resolved "https://registry.yarnpkg.com/@salesforce/core/-/core-9.1.4.tgz#264a618f962b7306794d5a7a42698bdb7dec6d04"
   integrity sha512-S4VZ0xstYOAs5dwt7EDGkuFZA8rddy0wmuPTGjsIhgAPzuq3I5lKyBNwqXMMxdhBcWi+P4cXccHLpOYivgdrXQ==