diff --git a/http3/http3_suite_test.go b/http3/http3_suite_test.go
index c2806f4a..5f49347d 100644
--- a/http3/http3_suite_test.go
+++ b/http3/http3_suite_test.go
@@ -1,8 +1,6 @@
 package http3
 
 import (
-	"io"
-	"net/http"
 	"os"
 	"strconv"
 	"testing"
@@ -18,14 +16,6 @@ func TestHttp3(t *testing.T) {
 	RunSpecs(t, "HTTP/3 Suite")
 }
 
-func mustNewRequest(method, url string, body io.Reader) *http.Request {
-	req, err := http.NewRequest(method, url, body)
-	if err != nil {
-		panic(err)
-	}
-	return req
-}
-
 var mockCtrl *gomock.Controller
 
 var _ = BeforeEach(func() {
diff --git a/http3/request_writer_test.go b/http3/request_writer_test.go
index 85ee512b..9a822b93 100644
--- a/http3/request_writer_test.go
+++ b/http3/request_writer_test.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"io"
 	"net/http"
+	"net/http/httptest"
 	"testing"
 
 	"github.com/quic-go/qpack"
@@ -41,8 +42,7 @@ func TestRequestWriterGetRequestGzip(t *testing.T) {
 }
 
 func testRequestWriterGzip(t *testing.T, gzip bool) {
-	req, err := http.NewRequest(http.MethodGet, "https://quic-go.net/index.html?foo=bar", nil)
-	require.NoError(t, err)
+	req := httptest.NewRequest(http.MethodGet, "https://quic-go.net/index.html?foo=bar", nil)
 	req.AddCookie(&http.Cookie{Name: "foo", Value: "bar"})
 	req.AddCookie(&http.Cookie{Name: "baz", Value: "lorem ipsum"})
 
@@ -64,8 +64,7 @@ func testRequestWriterGzip(t *testing.T, gzip bool) {
 }
 
 func TestRequestWriterInvalidHostHeader(t *testing.T) {
-	req, err := http.NewRequest(http.MethodGet, "https://quic-go.net/index.html?foo=bar", nil)
-	require.NoError(t, err)
+	req := httptest.NewRequest(http.MethodGet, "https://quic-go.net/index.html?foo=bar", nil)
 	req.Host = "foo@bar" // @ is invalid
 	rw := newRequestWriter()
 	require.EqualError(t,
@@ -75,6 +74,7 @@ func TestRequestWriterInvalidHostHeader(t *testing.T) {
 }
 
 func TestRequestWriterConnect(t *testing.T) {
+	// httptest.NewRequest does not properly support the CONNECT method
 	req, err := http.NewRequest(http.MethodConnect, "https://quic-go.net/", nil)
 	require.NoError(t, err)
 	rw := newRequestWriter()
@@ -89,6 +89,7 @@ func TestRequestWriterConnect(t *testing.T) {
 }
 
 func TestRequestWriterExtendedConnect(t *testing.T) {
+	// httptest.NewRequest does not properly support the CONNECT method
 	req, err := http.NewRequest(http.MethodConnect, "https://quic-go.net/", nil)
 	require.NoError(t, err)
 	req.Proto = "webtransport"
diff --git a/http3/transport_test.go b/http3/transport_test.go
index cc2ae6f8..1be74e2b 100644
--- a/http3/transport_test.go
+++ b/http3/transport_test.go
@@ -7,6 +7,7 @@ import (
 	"errors"
 	"io"
 	"net/http"
+	"net/http/httptest"
 	"testing"
 	"time"
 
@@ -57,13 +58,13 @@ func TestRequestValidation(t *testing.T) {
 	}{
 		{
 			name:        "plain HTTP",
-			req:         mustNewRequest(http.MethodGet, "http://www.example.org/", nil),
+			req:         httptest.NewRequest(http.MethodGet, "http://www.example.org/", nil),
 			expectedErr: "http3: unsupported protocol scheme: http",
 		},
 		{
 			name: "missing URL",
 			req: func() *http.Request {
-				r := mustNewRequest(http.MethodGet, "https://www.example.org/", nil)
+				r := httptest.NewRequest(http.MethodGet, "https://www.example.org/", nil)
 				r.URL = nil
 				return r
 			}(),
@@ -72,7 +73,7 @@ func TestRequestValidation(t *testing.T) {
 		{
 			name: "missing URL Host",
 			req: func() *http.Request {
-				r := mustNewRequest(http.MethodGet, "https://www.example.org/", nil)
+				r := httptest.NewRequest(http.MethodGet, "https://www.example.org/", nil)
 				r.URL.Host = ""
 				return r
 			}(),
@@ -81,7 +82,7 @@ func TestRequestValidation(t *testing.T) {
 		{
 			name: "missing header",
 			req: func() *http.Request {
-				r := mustNewRequest(http.MethodGet, "https://www.example.org/", nil)
+				r := httptest.NewRequest(http.MethodGet, "https://www.example.org/", nil)
 				r.Header = nil
 				return r
 			}(),
@@ -90,7 +91,7 @@ func TestRequestValidation(t *testing.T) {
 		{
 			name: "invalid header name",
 			req: func() *http.Request {
-				r := mustNewRequest(http.MethodGet, "https://www.example.org/", nil)
+				r := httptest.NewRequest(http.MethodGet, "https://www.example.org/", nil)
 				r.Header.Add("foobär", "value")
 				return r
 			}(),
@@ -99,7 +100,7 @@ func TestRequestValidation(t *testing.T) {
 		{
 			name: "invalid header value",
 			req: func() *http.Request {
-				r := mustNewRequest(http.MethodGet, "https://www.example.org/", nil)
+				r := httptest.NewRequest(http.MethodGet, "https://www.example.org/", nil)
 				r.Header.Add("foo", string([]byte{0x7}))
 				return r
 			}(),
@@ -108,7 +109,7 @@ func TestRequestValidation(t *testing.T) {
 		{
 			name: "invalid method",
 			req: func() *http.Request {
-				r := mustNewRequest(http.MethodGet, "https://www.example.org/", nil)
+				r := httptest.NewRequest(http.MethodGet, "https://www.example.org/", nil)
 				r.Method = "foobär"
 				return r
 			}(),
@@ -147,7 +148,7 @@ func TestTransportDialHostname(t *testing.T) {
 	}
 
 	t.Run("port set", func(t *testing.T) {
-		req := mustNewRequest(http.MethodGet, "https://quic-go.net:1234", nil)
+		req := httptest.NewRequest(http.MethodGet, "https://quic-go.net:1234", nil)
 		_, err := tr.RoundTripOpt(req, RoundTripOpt{})
 		require.EqualError(t, err, "test done")
 		select {
@@ -161,7 +162,7 @@ func TestTransportDialHostname(t *testing.T) {
 
 	// if the request doesn't have a port, the default port is used
 	t.Run("port not set", func(t *testing.T) {
-		req := mustNewRequest(http.MethodGet, "https://quic-go.net", nil)
+		req := httptest.NewRequest(http.MethodGet, "https://quic-go.net", nil)
 		_, err := tr.RoundTripOpt(req, RoundTripOpt{})
 		require.EqualError(t, err, "test done")
 		select {
@@ -184,7 +185,7 @@ func TestTransportDatagrams(t *testing.T) {
 				return nil, assert.AnError
 			},
 		}
-		req := mustNewRequest(http.MethodGet, "https://example.com", nil)
+		req := httptest.NewRequest(http.MethodGet, "https://example.com", nil)
 		_, err := tr.RoundTripOpt(req, RoundTripOpt{})
 		require.ErrorIs(t, err, assert.AnError)
 	})
@@ -199,7 +200,7 @@ func TestTransportDatagrams(t *testing.T) {
 				return nil, nil
 			},
 		}
-		req := mustNewRequest(http.MethodGet, "https://example.com", nil)
+		req := httptest.NewRequest(http.MethodGet, "https://example.com", nil)
 		_, err := tr.RoundTripOpt(req, RoundTripOpt{})
 		require.EqualError(t, err, "HTTP Datagrams enabled, but QUIC Datagrams disabled")
 	})
@@ -210,7 +211,7 @@ func TestTransportMultipleQUICVersions(t *testing.T) {
 		Versions: []quic.Version{protocol.Version2, protocol.Version1},
 	}
 	tr := &Transport{QUICConfig: qconf}
-	req := mustNewRequest(http.MethodGet, "https://example.com", nil)
+	req := httptest.NewRequest(http.MethodGet, "https://example.com", nil)
 	_, err := tr.RoundTrip(req)
 	require.EqualError(t, err, "can only use a single QUIC version for dialing a HTTP/3 connection")
 }
@@ -231,7 +232,7 @@ func TestTransportConnectionReuse(t *testing.T) {
 		newClientConn: func(quic.EarlyConnection) clientConn { return cl },
 	}
 
-	req1 := mustNewRequest("GET", "https://quic-go.net/file1.html", nil)
+	req1 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file1.html", nil)
 	// if OnlyCachedConn is set, no connection is dialed
 	_, err := tr.RoundTripOpt(req1, RoundTripOpt{OnlyCachedConn: true})
 	require.ErrorIs(t, err, ErrNoCachedConn)
@@ -245,7 +246,7 @@ func TestTransportConnectionReuse(t *testing.T) {
 	require.Equal(t, 1, dialCount)
 
 	// ... which is then used for the second request
-	req2 := mustNewRequest("GET", "https://quic-go.net/file2.html", nil)
+	req2 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file2.html", nil)
 	cl.EXPECT().RoundTrip(req2).Return(&http.Response{Request: req2}, nil)
 	rsp, err = tr.RoundTrip(req2)
 	require.NoError(t, err)
@@ -294,7 +295,7 @@ func testTransportConnectionRedial(t *testing.T, connClosed bool, roundtripErr,
 	}
 
 	// the first request succeeds
-	req1 := mustNewRequest("GET", "https://quic-go.net/file1.html", nil)
+	req1 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file1.html", nil)
 	cl.EXPECT().RoundTrip(req1).Return(&http.Response{Request: req1}, nil)
 	rsp, err := tr.RoundTrip(req1)
 	require.NoError(t, err)
@@ -302,7 +303,7 @@ func testTransportConnectionRedial(t *testing.T, connClosed bool, roundtripErr,
 	require.Equal(t, 1, dialCount)
 
 	// the second request reuses the QUIC connection, and encounters an error
-	req2 := mustNewRequest("GET", "https://quic-go.net/file2.html", nil)
+	req2 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file2.html", nil)
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	if connClosed {
@@ -328,7 +329,7 @@ func testTransportConnectionRedial(t *testing.T, connClosed bool, roundtripErr,
 		return
 	}
 	currentDialCount := dialCount
-	req3 := mustNewRequest("GET", "https://quic-go.net/file3.html", nil)
+	req3 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file3.html", nil)
 	cl.EXPECT().RoundTrip(req3).Return(&http.Response{Request: req3}, nil)
 	rsp, err = tr.RoundTrip(req3)
 	require.NoError(t, err)
@@ -353,7 +354,7 @@ func TestTransportRequestContextCancellation(t *testing.T) {
 	}
 
 	// the first request succeeds
-	req1 := mustNewRequest("GET", "https://quic-go.net/file1.html", nil)
+	req1 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file1.html", nil)
 	cl.EXPECT().RoundTrip(req1).Return(&http.Response{Request: req1}, nil)
 	rsp, err := tr.RoundTrip(req1)
 	require.NoError(t, err)
@@ -361,7 +362,7 @@ func TestTransportRequestContextCancellation(t *testing.T) {
 	require.Equal(t, 1, dialCount)
 
 	// the second request reuses the QUIC connection, and runs into the cancelled context
-	req2 := mustNewRequest("GET", "https://quic-go.net/file2.html", nil)
+	req2 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file2.html", nil)
 	ctx, cancel := context.WithCancel(context.Background())
 	req2 = req2.WithContext(ctx)
 	cl.EXPECT().RoundTrip(req2).DoAndReturn(
@@ -375,7 +376,7 @@ func TestTransportRequestContextCancellation(t *testing.T) {
 	require.Equal(t, 1, dialCount)
 
 	// the next request reuses the QUIC connection
-	req3 := mustNewRequest("GET", "https://quic-go.net/file2.html", nil)
+	req3 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file2.html", nil)
 	cl.EXPECT().RoundTrip(req3).Return(&http.Response{Request: req3}, nil)
 	rsp, err = tr.RoundTrip(req3)
 	require.NoError(t, err)
@@ -402,12 +403,12 @@ func TestTransportConnetionRedialHandshakeError(t *testing.T) {
 		newClientConn: func(quic.EarlyConnection) clientConn { return cl },
 	}
 
-	req1 := mustNewRequest("GET", "https://quic-go.net/file1.html", nil)
+	req1 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file1.html", nil)
 	_, err := tr.RoundTrip(req1)
 	require.ErrorIs(t, err, assert.AnError)
 	require.Equal(t, 1, dialCount)
 
-	req2 := mustNewRequest("GET", "https://quic-go.net/file2.html", nil)
+	req2 := httptest.NewRequest(http.MethodGet, "https://quic-go.net/file2.html", nil)
 	cl.EXPECT().RoundTrip(req2).Return(&http.Response{Request: req2}, nil)
 	rsp, err := tr.RoundTrip(req2)
 	require.NoError(t, err)
@@ -428,7 +429,7 @@ func TestTransportCloseEstablishedConnections(t *testing.T) {
 			return cl
 		},
 	}
-	req := mustNewRequest(http.MethodGet, "https://quic-go.net/foobar.html", nil)
+	req := httptest.NewRequest(http.MethodGet, "https://quic-go.net/foobar.html", nil)
 	_, err := tr.RoundTrip(req)
 	require.NoError(t, err)
 	conn.EXPECT().CloseWithError(quic.ApplicationErrorCode(0), "")
@@ -448,7 +449,7 @@ func TestTransportCloseInFlightDials(t *testing.T) {
 			return nil, err
 		},
 	}
-	req := mustNewRequest(http.MethodGet, "https://quic-go.net/foobar.html", nil)
+	req := httptest.NewRequest(http.MethodGet, "https://quic-go.net/foobar.html", nil)
 
 	errChan := make(chan error, 1)
 	go func() {
@@ -498,8 +499,8 @@ func TestTransportCloseIdleConnections(t *testing.T) {
 			return cl
 		},
 	}
-	req1 := mustNewRequest(http.MethodGet, "https://site1.com", nil)
-	req2 := mustNewRequest(http.MethodGet, "https://site2.com", nil)
+	req1 := httptest.NewRequest(http.MethodGet, "https://site1.com", nil)
+	req2 := httptest.NewRequest(http.MethodGet, "https://site2.com", nil)
 	require.NotEqual(t, req1.Host, req2.Host)
 	ctx1, cancel1 := context.WithCancel(context.Background())
 	ctx2, cancel2 := context.WithCancel(context.Background())