diff --git a/create-snowpack-app/app-template-preact-typescript/package.json b/create-snowpack-app/app-template-preact-typescript/package.json
index 0f2533d524..6294c47001 100644
--- a/create-snowpack-app/app-template-preact-typescript/package.json
+++ b/create-snowpack-app/app-template-preact-typescript/package.json
@@ -23,7 +23,7 @@
     "test": "web-test-runner \"src/**/*.test.tsx\""
   },
   "dependencies": {
-    "preact": "^10.5.4"
+    "preact": "^10.0.0"
   },
   "devDependencies": {
     "@prefresh/snowpack": "^2.0.1",
@@ -32,6 +32,7 @@
     "@snowpack/web-test-runner-plugin": "^0.1.5",
     "@testing-library/preact": "^2.0.0",
     "@types/chai": "^4.2.14",
+    "@web/test-runner": "^0.10.0",
     "chai": "^4.2.0",
     "prettier": "^2.0.5",
     "snowpack": "^2.18.2",
diff --git a/create-snowpack-app/app-template-preact/package.json b/create-snowpack-app/app-template-preact/package.json
index b951bb447e..053004b310 100644
--- a/create-snowpack-app/app-template-preact/package.json
+++ b/create-snowpack-app/app-template-preact/package.json
@@ -23,7 +23,7 @@
     "test": "web-test-runner \"src/**/*.test.jsx\""
   },
   "dependencies": {
-    "preact": "^10.4.6"
+    "preact": "^10.0.0"
   },
   "devDependencies": {
     "@prefresh/snowpack": "^2.0.1",
diff --git a/test/build/module-resolution/package.json b/test/build/module-resolution/package.json
index 92ed16e3fd..0393fb8dd5 100644
--- a/test/build/module-resolution/package.json
+++ b/test/build/module-resolution/package.json
@@ -7,7 +7,7 @@
     "testbuild": "snowpack build --no-treeshake"
   },
   "devDependencies": {
-    "preact": "^10.4.6",
+    "preact": "^10.0.0",
     "snowpack": "^2.14.3"
   }
 }
diff --git a/test/esinstall/config-alias/package.json b/test/esinstall/config-alias/package.json
index 227f66d7fc..3bd62cc015 100644
--- a/test/esinstall/config-alias/package.json
+++ b/test/esinstall/config-alias/package.json
@@ -22,7 +22,7 @@
     }
   },
   "dependencies": {
-    "preact": "^10.4.6",
+    "preact": "^10.0.0",
     "vue": "^2.6.12",
     "vue-currency-input": "^1.21.0"
   },
diff --git a/test/esinstall/package-entrypoints/package.json b/test/esinstall/package-entrypoints/package.json
index 1315ecc982..2305b29d3f 100644
--- a/test/esinstall/package-entrypoints/package.json
+++ b/test/esinstall/package-entrypoints/package.json
@@ -26,7 +26,7 @@
     "export-map-object-import": "file:./export-map-object-import",
     "export-map-object-default": "file:./export-map-object-default",
     "export-map-object-require": "file:./export-map-object-require",
-    "preact": "^10.4.6"
+    "preact": "^10.0.0"
   },
   "devDependencies": {
     "esinstall": "^0.4.0"
diff --git a/yarn.lock b/yarn.lock
index b7f5cf33fc..79e6da6870 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11401,7 +11401,7 @@ postcss@^8.1.8:
     nanoid "^3.1.20"
     source-map "^0.6.1"
 
-preact@^10.4.6, preact@^10.5.4:
+preact@^10.0.0:
   version "10.5.7"
   resolved "https://registry.yarnpkg.com/preact/-/preact-10.5.7.tgz#f1d84725539e18f7ccbea937cf3db5895661dbd3"
   integrity sha512-4oEpz75t/0UNcwmcsjk+BIcDdk68oao+7kxcpc1hQPNs2Oo3ZL9xFz8UBf350mxk/VEdD41L5b4l2dE3Ug3RYg==
@@ -12904,7 +12904,7 @@ solid-js@^0.16.7:
   resolved "https://registry.yarnpkg.com/solid-js/-/solid-js-0.16.14.tgz#098aea093d1f1660c3572eda5af085e5d0cc2f20"
   integrity sha512-fdkzrseYaileVAHJAmGRXBrq6Uyd7zwGK53T+QnKTlvd5hhPSh5i2W8vny1HycHTXZ3v8oms/2H2Gj3/cVfVqQ==
 
-"some-custom-lookup-package@file:./test/esinstall/config-package-lookup-fields/packages/some-custom-lookup-package":
+"some-custom-lookup-package@file:./test/build/config-package-lookup-fields/packages/some-custom-lookup-package":
   version "1.0.0"
 
 sort-keys@^2.0.0: