diff --git a/package.json b/package.json
index e42f8e55..6476b741 100644
--- a/package.json
+++ b/package.json
@@ -27,9 +27,7 @@
         "build": "vite build --config ./config/vite.config.js",
         "test": "npm run test-backend && npm run test-e2e",
         "test-with-build": "npm run build && npm test",
-        "test-backend": "node test/backend-test-entry.js",
-        "test-backend:14": "cross-env TEST_BACKEND=1 NODE_OPTIONS=\"--experimental-abortcontroller --no-warnings\" node--test test/backend-test",
-        "test-backend:18": "cross-env TEST_BACKEND=1 node --test test/backend-test",
+        "test-backend": "cross-env TEST_BACKEND=1 node --test test/backend-test",
         "test-e2e": "playwright test --config ./config/playwright.config.js",
         "test-e2e-ui": "playwright test --config ./config/playwright.config.js --ui --ui-port=51063",
         "playwright-codegen": "playwright codegen localhost:3000 --save-storage=./private/e2e-auth.json",
diff --git a/server/notification-providers/nostr.js b/server/notification-providers/nostr.js
index 453b86d0..87847382 100644
--- a/server/notification-providers/nostr.js
+++ b/server/notification-providers/nostr.js
@@ -1,4 +1,3 @@
-const { log } = require("../../src/util");
 const NotificationProvider = require("./notification-provider");
 const {
     relayInit,
@@ -12,16 +11,7 @@ const {
 // polyfills for node versions
 const semver = require("semver");
 const nodeVersion = process.version;
-if (semver.lt(nodeVersion, "16.0.0")) {
-    log.warn("monitor", "Node <= 16 is unsupported for nostr, sorry :(");
-} else if (semver.lt(nodeVersion, "18.0.0")) {
-    // polyfills for node 16
-    global.crypto = require("crypto");
-    global.WebSocket = require("isomorphic-ws");
-    if (typeof crypto !== "undefined" && !crypto.subtle && crypto.webcrypto) {
-        crypto.subtle = crypto.webcrypto.subtle;
-    }
-} else if (semver.lt(nodeVersion, "20.0.0")) {
+if (semver.lt(nodeVersion, "20.0.0")) {
     // polyfills for node 18
     global.crypto = require("crypto");
     global.WebSocket = require("isomorphic-ws");
diff --git a/server/server.js b/server/server.js
index d0af4038..f14cb2dd 100644
--- a/server/server.js
+++ b/server/server.js
@@ -19,7 +19,7 @@ const nodeVersion = process.versions.node;
 
 // Get the required Node.js version from package.json
 const requiredNodeVersions = require("../package.json").engines.node;
-const bannedNodeVersions = " < 14 || 20.0.* || 20.1.* || 20.2.* || 20.3.* ";
+const bannedNodeVersions = " < 18 || 20.0.* || 20.1.* || 20.2.* || 20.3.* ";
 console.log(`Your Node.js version: ${nodeVersion}`);
 
 const semver = require("semver");
diff --git a/test/backend-test-entry.js b/test/backend-test-entry.js
deleted file mode 100644
index 7cc8d734..00000000
--- a/test/backend-test-entry.js
+++ /dev/null
@@ -1,20 +0,0 @@
-// Check Node.js version
-const semver = require("semver");
-const childProcess = require("child_process");
-
-const nodeVersion = process.versions.node;
-console.log("Node.js version: " + nodeVersion);
-
-
-
-// Node.js version >= 18
-if (semver.satisfies(nodeVersion, ">= 18")) {
-    console.log("Use the native test runner: `node --test`");
-    childProcess.execSync("npm run test-backend:18", { stdio: "inherit" });
-} else {
-    // 14 - 16 here
-    console.log("Use `test` package: `node--test`")
-    childProcess.execSync("npm run test-backend:14", { stdio: "inherit" });
-}
-
-
diff --git a/test/backend-test/README.md b/test/backend-test/README.md
index 5686fae7..775ffb7a 100644
--- a/test/backend-test/README.md
+++ b/test/backend-test/README.md
@@ -7,15 +7,7 @@ Create a test file in this directory with the name `*.js`.
 ## Template
 
 ```js
-const semver = require("semver");
-let test;
-const nodeVersion = process.versions.node;
-if (semver.satisfies(nodeVersion, ">= 18")) {
-    test = require("node:test");
-} else {
-    test = require("test");
-}
-
+const test = require("node:test");
 const assert = require("node:assert");
 
 test("Test name", async (t) => {
@@ -25,14 +17,6 @@ test("Test name", async (t) => {
 
 ## Run
 
-Node.js >=18
-
-```bash
-npm run test-backend:18
-```
-
-Node.js < 18
-
 ```bash
-npm run test-backend:14
+npm run test-backend
 ```
diff --git a/test/backend-test/test-uptime-calculator.js b/test/backend-test/test-uptime-calculator.js
index 0c7a38d2..4f2f05ef 100644
--- a/test/backend-test/test-uptime-calculator.js
+++ b/test/backend-test/test-uptime-calculator.js
@@ -1,13 +1,4 @@
-const semver = require("semver");
-let test;
-const nodeVersion = process.versions.node;
-// Node.js version >= 18
-if (semver.satisfies(nodeVersion, ">= 18")) {
-    test = require("node:test");
-} else {
-    test = require("test");
-}
-
+const test = require("node:test");
 const assert = require("node:assert");
 const { UptimeCalculator } = require("../../server/uptime-calculator");
 const dayjs = require("dayjs");