diff --git a/internal/qtls/cipher_suite_test.go b/internal/qtls/cipher_suite_test.go
new file mode 100644
index 00000000..716d8217
--- /dev/null
+++ b/internal/qtls/cipher_suite_test.go
@@ -0,0 +1,50 @@
+package qtls
+
+import (
+	"crypto/tls"
+	"fmt"
+	"net"
+
+	"github.com/quic-go/quic-go/internal/testdata"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Setting the Cipher Suite", func() {
+	for _, cs := range []uint16{tls.TLS_AES_128_GCM_SHA256, tls.TLS_CHACHA20_POLY1305_SHA256, tls.TLS_AES_256_GCM_SHA384} {
+		cs := cs
+
+		It(fmt.Sprintf("selects %s", tls.CipherSuiteName(cs)), func() {
+			reset := SetCipherSuite(cs)
+			defer reset()
+
+			ln, err := tls.Listen("tcp4", "localhost:0", testdata.GetTLSConfig())
+			Expect(err).ToNot(HaveOccurred())
+			defer ln.Close()
+
+			done := make(chan struct{})
+			go func() {
+				defer GinkgoRecover()
+				defer close(done)
+				conn, err := ln.Accept()
+				Expect(err).ToNot(HaveOccurred())
+				_, err = conn.Read(make([]byte, 10))
+				Expect(err).ToNot(HaveOccurred())
+				Expect(conn.(*tls.Conn).ConnectionState().CipherSuite).To(Equal(cs))
+			}()
+
+			conn, err := tls.Dial(
+				"tcp4",
+				fmt.Sprintf("localhost:%d", ln.Addr().(*net.TCPAddr).Port),
+				&tls.Config{RootCAs: testdata.GetRootCA()},
+			)
+			Expect(err).ToNot(HaveOccurred())
+			_, err = conn.Write([]byte("foobar"))
+			Expect(err).ToNot(HaveOccurred())
+			Expect(conn.ConnectionState().CipherSuite).To(Equal(cs))
+			Expect(conn.Close()).To(Succeed())
+			Eventually(done).Should(BeClosed())
+		})
+	}
+})
diff --git a/internal/qtls/go_oldversion.go b/internal/qtls/go_oldversion.go
deleted file mode 100644
index 2903587e..00000000
--- a/internal/qtls/go_oldversion.go
+++ /dev/null
@@ -1,5 +0,0 @@
-//go:build !go1.20
-
-package qtls
-
-var _ int = "The version of quic-go you're using can't be built using outdated Go versions. For more details, please see https://github.com/refraction-networking/uquic/wiki/quic-go-and-Go-versions."