diff --git a/client.go b/client.go
index bef9434..73eada1 100644
--- a/client.go
+++ b/client.go
@@ -409,3 +409,15 @@ func cloneTLSConfig(cfg *tls.Config) *tls.Config {
 	}
 	return cfg.Clone()
 }
+
+func doHandshake(ctx context.Context, tlsConn *tls.Conn, cfg *tls.Config) error {
+	if err := tlsConn.HandshakeContext(ctx); err != nil {
+		return err
+	}
+	if !cfg.InsecureSkipVerify {
+		if err := tlsConn.VerifyHostname(cfg.ServerName); err != nil {
+			return err
+		}
+	}
+	return nil
+}
diff --git a/tls_handshake.go b/tls_handshake.go
deleted file mode 100644
index a62b68c..0000000
--- a/tls_handshake.go
+++ /dev/null
@@ -1,21 +0,0 @@
-//go:build go1.17
-// +build go1.17
-
-package websocket
-
-import (
-	"context"
-	"crypto/tls"
-)
-
-func doHandshake(ctx context.Context, tlsConn *tls.Conn, cfg *tls.Config) error {
-	if err := tlsConn.HandshakeContext(ctx); err != nil {
-		return err
-	}
-	if !cfg.InsecureSkipVerify {
-		if err := tlsConn.VerifyHostname(cfg.ServerName); err != nil {
-			return err
-		}
-	}
-	return nil
-}
diff --git a/tls_handshake_116.go b/tls_handshake_116.go
deleted file mode 100644
index e1b2b44..0000000
--- a/tls_handshake_116.go
+++ /dev/null
@@ -1,21 +0,0 @@
-//go:build !go1.17
-// +build !go1.17
-
-package websocket
-
-import (
-	"context"
-	"crypto/tls"
-)
-
-func doHandshake(ctx context.Context, tlsConn *tls.Conn, cfg *tls.Config) error {
-	if err := tlsConn.Handshake(); err != nil {
-		return err
-	}
-	if !cfg.InsecureSkipVerify {
-		if err := tlsConn.VerifyHostname(cfg.ServerName); err != nil {
-			return err
-		}
-	}
-	return nil
-}