diff --git a/helpers_test.go b/helpers_test.go
index f40c996..69dfbce 100644
--- a/helpers_test.go
+++ b/helpers_test.go
@@ -2,10 +2,8 @@ package csrf
 
 import (
 	"bytes"
-	"crypto/rand"
 	"encoding/base64"
 	"fmt"
-	"io"
 	"log"
 	"mime/multipart"
 	"net/http"
@@ -201,29 +199,6 @@ func TestXOR(t *testing.T) {
 	}
 }
 
-// shortReader provides a broken implementation of io.Reader for testing.
-type shortReader struct{}
-
-func (sr shortReader) Read(p []byte) (int, error) {
-	return len(p) % 2, io.ErrUnexpectedEOF
-}
-
-// TestGenerateRandomBytes tests the (extremely rare) case that crypto/rand does
-// not return the expected number of bytes.
-func TestGenerateRandomBytes(t *testing.T) {
-	// Pioneered from https://github.com/justinas/nosurf
-	original := rand.Reader
-	rand.Reader = shortReader{}
-	defer func() {
-		rand.Reader = original
-	}()
-
-	b, err := generateRandomBytes(tokenLength)
-	if err == nil {
-		t.Fatalf("generateRandomBytes did not report a short read: only read %d bytes", len(b))
-	}
-}
-
 func TestTemplateField(t *testing.T) {
 	s := http.NewServeMux()