diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 84201924a75..a01c126c1d7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -43,12 +43,20 @@ jobs:
         run: npm ls --all
         continue-on-error: true
 
-      - name: Run tests
+      - name: Run tests with coverage
+        id: coverage
+        if: inputs.runs-on == 'ubuntu-latest' && inputs.node-version == 20
         run: npm run coverage:ci
         env:
           CI: true
           NODE_V8_COVERAGE: ./coverage/tmp
 
+      - name: Run tests
+        if: steps.coverage.outcome == 'skipped'
+        run: npm run test:javascript
+        env:
+          CI: true
+
       - name: Coverage Report
         if: inputs.runs-on == 'ubuntu-latest' && inputs.node-version == 20
         uses: codecov/codecov-action@c16abc29c95fcf9174b58eb7e1abf4c866893bc8 # v4.1.1
diff --git a/test/client-request.js b/test/client-request.js
index e71a034408d..4071b484c50 100644
--- a/test/client-request.js
+++ b/test/client-request.js
@@ -53,6 +53,7 @@ test('request dump', async (t) => {
   t = tspl(t, { plan: 3 })
 
   const server = createServer((req, res) => {
+    res.shouldKeepAlive = false
     res.setHeader('content-length', 5)
     res.end('hello')
   })
diff --git a/test/content-length.js b/test/content-length.js
index 847e2bca023..ece0747406a 100644
--- a/test/content-length.js
+++ b/test/content-length.js
@@ -303,6 +303,7 @@ test('request streaming with Readable.from(buf)', async (t) => {
 test('request DELETE, content-length=0, with body', async (t) => {
   t = tspl(t, { plan: 5 })
   const server = createServer((req, res) => {
+    res.shouldKeepAlive = false
     res.end()
   })
   server.on('request', (req, res) => {
diff --git a/test/issue-803.js b/test/issue-803.js
index 0ab94cd1d37..5c2eb21b6e5 100644
--- a/test/issue-803.js
+++ b/test/issue-803.js
@@ -8,16 +8,18 @@ const { createServer } = require('node:http')
 
 test('https://github.com/nodejs/undici/issues/803', { timeout: 60000 }, async (t) => {
   t = tspl(t, { plan: 2 })
-
   const SIZE = 5900373096
-  const chunkSize = 65536
-  const parts = (SIZE / chunkSize) | 0
-  const lastPartSize = SIZE % chunkSize
-  const chunk = Buffer.allocUnsafe(chunkSize)
 
   const server = createServer(async (req, res) => {
+    const chunkSize = res.writableHighWaterMark << 5
+    const parts = (SIZE / chunkSize) | 0
+    const lastPartSize = SIZE % chunkSize
+    const chunk = Buffer.allocUnsafe(chunkSize)
+
+    res.shouldKeepAlive = false
     res.setHeader('content-length', SIZE)
     let i = 0
+
     while (i++ < parts) {
       if (res.write(chunk) === false) {
         await once(res, 'drain')