diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 687bbfc..3c38681 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [16.x, 18.x, 19.x]
         config: ["configs/ghostery.js", "configs/user-agent-ios.js"]
 
     steps:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 7a8a74f..9ca4543 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -15,10 +15,10 @@ jobs:
       - name: Prepare repository
         run: git fetch --unshallow --tags
 
-      - name: Use Node.js 18
+      - name: Use Node.js 19
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 19.x
 
       - name: Install
         run: npm ci
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index f9ea679..dd35d18 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [16.x, 18.x, 19.x]
 
     steps:
     - uses: actions/checkout@v2
diff --git a/.tool-versions b/.tool-versions
index 603e4f0..747f10e 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-nodejs 19.8.1
\ No newline at end of file
+nodejs 19.9.0
\ No newline at end of file
diff --git a/modules/antitracking/tests/unit/token-telemetry-test.es b/modules/antitracking/tests/unit/token-telemetry-test.es
index b737acc..c158642 100644
--- a/modules/antitracking/tests/unit/token-telemetry-test.es
+++ b/modules/antitracking/tests/unit/token-telemetry-test.es
@@ -47,7 +47,7 @@ class MockQsWhitelist {
   }
 }
 
-const tick = () => new Promise(resolve => setTimeout(resolve, 10));
+const tick = () => new Promise(resolve => setTimeout(resolve, 20));
 
 const mockConfig = {
   telemetryMode: 2,
diff --git a/modules/hpn-lite/tests/unit/server-public-key-accessor-test.es b/modules/hpn-lite/tests/unit/server-public-key-accessor-test.es
index f0d487d..201e835 100644
--- a/modules/hpn-lite/tests/unit/server-public-key-accessor-test.es
+++ b/modules/hpn-lite/tests/unit/server-public-key-accessor-test.es
@@ -90,16 +90,15 @@ export default describeModule('hpn-lite/server-public-key-accessor',
         await storage.set(someStorageKey, entry);
       };
 
-      const oldCrypto = global.crypto;
+      const oldImportKey = global.crypto && global.crypto.subtle.importKey;
+      let hadNoCrypto = false;
       beforeEach(async function () {
         /* eslint-disable-next-line global-require */
-        global.crypto = global.crypto || {
-          subtle: {
-            importKey(...args) {
-              return MOCKS.importKey(...args);
-            },
-          }
-        };
+        if (!global.crypto) {
+          hadNoCrypto = true;
+          global.crypto = { subtle: {} };
+        }
+        global.crypto.subtle.importKey = (...args) => MOCKS.importKey(...args);
 
         // in-memory implementation of storage
         MemoryPersistentMap = (await this.system.import('core/helpers/memory-map')).default;
@@ -117,7 +116,10 @@ export default describeModule('hpn-lite/server-public-key-accessor',
       });
 
       afterEach(function () {
-        global.crypto = oldCrypto;
+        global.crypto.subtle.importKey = oldImportKey;
+        if (hadNoCrypto) {
+          delete global.crypto;
+        }
       });
 
       it('should be able to retrieve a key and cache it (happy path)', async function () {