diff --git a/packages/cli/package.json b/packages/cli/package.json
index 00bf463018..668ec5e000 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -96,7 +96,7 @@
     "sucrase": "^3.16.0",
     "tar": "^6.0.1",
     "terser-webpack-plugin": "^1.4.3",
-    "ts-jest": "^26.3.0",
+    "ts-jest": "^26.0.0",
     "ts-loader": "^7.0.4",
     "typescript": "^4.0.3",
     "url-loader": "^4.1.0",
diff --git a/yarn.lock b/yarn.lock
index 52f797f241..70b224a600 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2315,11 +2315,6 @@
     slash "^3.0.0"
     strip-ansi "^6.0.0"
 
-"@jest/create-cache-key-function@^26.5.0":
-  version "26.5.0"
-  resolved "https://registry.npmjs.org/@jest/create-cache-key-function/-/create-cache-key-function-26.5.0.tgz#1d07947adc51ea17766d9f0ccf5a8d6ea94c47dc"
-  integrity sha512-DJ+pEBUIqarrbv1W/C39f9YH0rJ4wsXZ/VC6JafJPlHW2HOucKceeaqTOQj9MEDQZjySxMLkOq5mfXZXNZcmWw==
-
 "@jest/environment@^26.5.2":
   version "26.5.2"
   resolved "https://registry.npmjs.org/@jest/environment/-/environment-26.5.2.tgz#eba3cfc698f6e03739628f699c28e8a07f5e65fe"
@@ -2466,17 +2461,6 @@
     "@types/yargs" "^15.0.0"
     chalk "^4.0.0"
 
-"@jest/types@^26.6.1":
-  version "26.6.1"
-  resolved "https://registry.npmjs.org/@jest/types/-/types-26.6.1.tgz#2638890e8031c0bc8b4681e0357ed986e2f866c5"
-  integrity sha512-ywHavIKNpAVrStiRY5wiyehvcktpijpItvGiK72RAn5ctqmzvPk8OvKnvHeBqa1XdQr959CTWAJMqxI8BTibyg==
-  dependencies:
-    "@types/istanbul-lib-coverage" "^2.0.0"
-    "@types/istanbul-reports" "^3.0.0"
-    "@types/node" "*"
-    "@types/yargs" "^15.0.0"
-    chalk "^4.0.0"
-
 "@jsdevtools/ono@^7.1.3":
   version "7.1.3"
   resolved "https://registry.npmjs.org/@jsdevtools/ono/-/ono-7.1.3.tgz#9df03bbd7c696a5c58885c34aa06da41c8543796"
@@ -5258,14 +5242,6 @@
     jest-diff "^25.2.1"
     pretty-format "^25.2.1"
 
-"@types/jest@26.x":
-  version "26.0.15"
-  resolved "https://registry.npmjs.org/@types/jest/-/jest-26.0.15.tgz#12e02c0372ad0548e07b9f4e19132b834cb1effe"
-  integrity sha512-s2VMReFXRg9XXxV+CW9e5Nz8fH2K1aEhwgjUqPPbQd7g95T0laAcvLv032EhFHIa5GHsZ8W7iJEQVaJq6k3Gog==
-  dependencies:
-    jest-diff "^26.0.0"
-    pretty-format "^26.0.0"
-
 "@types/jquery@^3.3.34":
   version "3.5.1"
   resolved "https://registry.npmjs.org/@types/jquery/-/jquery-3.5.1.tgz#cebb057acf5071c40e439f30e840c57a30d406c3"
@@ -14374,16 +14350,6 @@ jest-diff@^25.2.1:
     jest-get-type "^25.2.6"
     pretty-format "^25.5.0"
 
-jest-diff@^26.0.0:
-  version "26.6.1"
-  resolved "https://registry.npmjs.org/jest-diff/-/jest-diff-26.6.1.tgz#38aa194979f454619bb39bdee299fb64ede5300c"
-  integrity sha512-BBNy/zin2m4kG5In126O8chOBxLLS/XMTuuM2+YhgyHk87ewPzKTuTJcqj3lOWOi03NNgrl+DkMeV/exdvG9gg==
-  dependencies:
-    chalk "^4.0.0"
-    diff-sequences "^26.5.0"
-    jest-get-type "^26.3.0"
-    pretty-format "^26.6.1"
-
 jest-diff@^26.5.2:
   version "26.5.2"
   resolved "https://registry.npmjs.org/jest-diff/-/jest-diff-26.5.2.tgz#8e26cb32dc598e8b8a1b9deff55316f8313c8053"
@@ -14661,18 +14627,6 @@ jest-snapshot@^26.5.3:
     pretty-format "^26.5.2"
     semver "^7.3.2"
 
-jest-util@^26.1.0:
-  version "26.6.1"
-  resolved "https://registry.npmjs.org/jest-util/-/jest-util-26.6.1.tgz#4cc0d09ec57f28d12d053887eec5dc976a352e9b"
-  integrity sha512-xCLZUqVoqhquyPLuDXmH7ogceGctbW8SMyQVjD9o+1+NPWI7t0vO08udcFLVPLgKWcvc+zotaUv/RuaR6l8HIA==
-  dependencies:
-    "@jest/types" "^26.6.1"
-    "@types/node" "*"
-    chalk "^4.0.0"
-    graceful-fs "^4.2.4"
-    is-ci "^2.0.0"
-    micromatch "^4.0.2"
-
 jest-util@^26.5.2:
   version "26.5.2"
   resolved "https://registry.npmjs.org/jest-util/-/jest-util-26.5.2.tgz#8403f75677902cc52a1b2140f568e91f8ed4f4d7"
@@ -16244,6 +16198,14 @@ microevent.ts@~0.1.1:
   resolved "https://registry.npmjs.org/microevent.ts/-/microevent.ts-0.1.1.tgz#70b09b83f43df5172d0205a63025bce0f7357fa0"
   integrity sha512-jo1OfR4TaEwd5HOrt5+tAZ9mqT4jmpNAusXtyfNzqVm9uiSYFZlKM1wYL4oU7azZW/PxQW53wM0S6OR1JHNa2g==
 
+micromatch@4.x, micromatch@^4.0.0, micromatch@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.npmjs.org/micromatch/-/micromatch-4.0.2.tgz#4fcb0999bf9fbc2fcbdd212f6d629b9a56c39259"
+  integrity sha512-y7FpHSbMUMoyPbYUSzO6PaZ6FyRnQOpHuKwbo1G+Knck95XVU4QAiKdGEnj5wwoS7PlOgthX/09u5iFJ+aYf5Q==
+  dependencies:
+    braces "^3.0.1"
+    picomatch "^2.0.5"
+
 micromatch@^3.0.4, micromatch@^3.1.10, micromatch@^3.1.4:
   version "3.1.10"
   resolved "https://registry.npmjs.org/micromatch/-/micromatch-3.1.10.tgz#70859bc95c9840952f359a068a3fc49f9ecfac23"
@@ -16263,14 +16225,6 @@ micromatch@^3.0.4, micromatch@^3.1.10, micromatch@^3.1.4:
     snapdragon "^0.8.1"
     to-regex "^3.0.2"
 
-micromatch@^4.0.0, micromatch@^4.0.2:
-  version "4.0.2"
-  resolved "https://registry.npmjs.org/micromatch/-/micromatch-4.0.2.tgz#4fcb0999bf9fbc2fcbdd212f6d629b9a56c39259"
-  integrity sha512-y7FpHSbMUMoyPbYUSzO6PaZ6FyRnQOpHuKwbo1G+Knck95XVU4QAiKdGEnj5wwoS7PlOgthX/09u5iFJ+aYf5Q==
-  dependencies:
-    braces "^3.0.1"
-    picomatch "^2.0.5"
-
 miller-rabin@^4.0.0:
   version "4.0.1"
   resolved "https://registry.npmjs.org/miller-rabin/-/miller-rabin-4.0.1.tgz#f080351c865b0dc562a8462966daa53543c78a4d"
@@ -18857,16 +18811,6 @@ pretty-format@^25.2.1, pretty-format@^25.5.0:
     ansi-styles "^4.0.0"
     react-is "^16.12.0"
 
-pretty-format@^26.0.0, pretty-format@^26.6.1:
-  version "26.6.1"
-  resolved "https://registry.npmjs.org/pretty-format/-/pretty-format-26.6.1.tgz#af9a2f63493a856acddeeb11ba6bcf61989660a8"
-  integrity sha512-MeqqsP5PYcRBbGMvwzsyBdmAJ4EFX7pWFyl7x4+dMVg5pE0ZDdBIvEH2ergvIO+Gvwv1wh64YuOY9y5LuyY/GA==
-  dependencies:
-    "@jest/types" "^26.6.1"
-    ansi-regex "^5.0.0"
-    ansi-styles "^4.0.0"
-    react-is "^17.0.1"
-
 pretty-format@^26.4.2:
   version "26.4.2"
   resolved "https://registry.npmjs.org/pretty-format/-/pretty-format-26.4.2.tgz#d081d032b398e801e2012af2df1214ef75a81237"
@@ -19552,11 +19496,6 @@ react-is@^16.12.0, react-is@^16.6.0, react-is@^16.7.0, react-is@^16.8.0, react-i
   resolved "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz#789729a4dc36de2999dc156dd6c1d9c18cea56a4"
   integrity sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==
 
-react-is@^17.0.1:
-  version "17.0.1"
-  resolved "https://registry.npmjs.org/react-is/-/react-is-17.0.1.tgz#5b3531bd76a645a4c9fb6e693ed36419e3301339"
-  integrity sha512-NAnt2iGDXohE5LI7uBnLnqvLQMtzhkiAOLXTmv+qnF9Ky7xAPcX8Up/xWIhxvLVGJvuLiNc4xQLtuqDRzb4fSA==
-
 react-lazylog@^4.5.2, react-lazylog@^4.5.3:
   version "4.5.3"
   resolved "https://registry.npmjs.org/react-lazylog/-/react-lazylog-4.5.3.tgz#289e24995b5599e75943556ac63f5e2c04d0001e"
@@ -22800,23 +22739,21 @@ ts-invariant@^0.4.0:
   dependencies:
     tslib "^1.9.3"
 
-ts-jest@^26.3.0:
-  version "26.4.3"
-  resolved "https://registry.npmjs.org/ts-jest/-/ts-jest-26.4.3.tgz#d153a616033e7ec8544b97ddbe2638cbe38d53db"
-  integrity sha512-pFDkOKFGY+nL9v5pkhm+BIFpoAuno96ff7GMnIYr/3L6slFOS365SI0fGEVYx2RKGji5M2elxhWjDMPVcOCdSw==
+ts-jest@^26.0.0:
+  version "26.1.1"
+  resolved "https://registry.npmjs.org/ts-jest/-/ts-jest-26.1.1.tgz#b98569b8a4d4025d966b3d40c81986dd1c510f8d"
+  integrity sha512-Lk/357quLg5jJFyBQLnSbhycnB3FPe+e9i7ahxokyXxAYoB0q1pPmqxxRPYr4smJic1Rjcf7MXDBhZWgxlli0A==
   dependencies:
-    "@jest/create-cache-key-function" "^26.5.0"
-    "@types/jest" "26.x"
     bs-logger "0.x"
     buffer-from "1.x"
     fast-json-stable-stringify "2.x"
-    jest-util "^26.1.0"
     json5 "2.x"
     lodash.memoize "4.x"
     make-error "1.x"
+    micromatch "4.x"
     mkdirp "1.x"
     semver "7.x"
-    yargs-parser "20.x"
+    yargs-parser "18.x"
 
 ts-loader@^7.0.4:
   version "7.0.4"
@@ -24277,10 +24214,13 @@ yaml@*, yaml@^1.10.0, yaml@^1.7.2, yaml@^1.9.2:
   resolved "https://registry.npmjs.org/yaml/-/yaml-1.10.0.tgz#3b593add944876077d4d683fee01081bd9fff31e"
   integrity sha512-yr2icI4glYaNG+KWONODapy2/jDdMSDnrONSjblABjD9B4Z5LgiircSt8m8sRZFNi08kG9Sm0uSHtEmP3zaEGg==
 
-yargs-parser@20.x:
-  version "20.2.3"
-  resolved "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.3.tgz#92419ba867b858c868acf8bae9bf74af0dd0ce26"
-  integrity sha512-emOFRT9WVHw03QSvN5qor9QQT9+sw5vwxfYweivSMHTcAXPefwVae2FjO7JJjj8hCE4CzPOPeFM83VwT29HCww==
+yargs-parser@18.x, yargs-parser@^18.1.2:
+  version "18.1.3"
+  resolved "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz#be68c4975c6b2abf469236b0c870362fab09a7b0"
+  integrity sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==
+  dependencies:
+    camelcase "^5.0.0"
+    decamelize "^1.2.0"
 
 yargs-parser@^10.0.0:
   version "10.1.0"
@@ -24305,14 +24245,6 @@ yargs-parser@^15.0.1:
     camelcase "^5.0.0"
     decamelize "^1.2.0"
 
-yargs-parser@^18.1.2:
-  version "18.1.3"
-  resolved "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz#be68c4975c6b2abf469236b0c870362fab09a7b0"
-  integrity sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==
-  dependencies:
-    camelcase "^5.0.0"
-    decamelize "^1.2.0"
-
 yargs-parser@^20.0.0:
   version "20.2.1"
   resolved "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.1.tgz#28f3773c546cdd8a69ddae68116b48a5da328e77"