diff --git a/tests/nghttp2_frame_test.c b/tests/nghttp2_frame_test.c
index cb1f51e6..56abc95d 100644
--- a/tests/nghttp2_frame_test.c
+++ b/tests/nghttp2_frame_test.c
@@ -79,6 +79,7 @@ void test_nghttp2_frame_pack_headers()
   nghttp2_nv *nva;
   ssize_t nvlen;
   nva_out out;
+  ssize_t nv_offset;
 
   nva_out_init(&out);
   nghttp2_hd_deflate_init(&deflater, NGHTTP2_HD_SIDE_REQUEST);
@@ -102,9 +103,10 @@ void test_nghttp2_frame_pack_headers()
   /* We didn't include PRIORITY flag so priority is not packed */
   CU_ASSERT(1 << 30 == oframe.pri);
 
-  CU_ASSERT(framelen - (ssize_t)bufoff - 8 ==
+  nv_offset = bufoff + NGHTTP2_FRAME_HEAD_LENGTH;
+  CU_ASSERT(framelen - nv_offset ==
             inflate_hd(&inflater, &out,
-                       buf + bufoff + 8, framelen - bufoff - 8));
+                       buf + nv_offset, framelen - nv_offset));
 
   CU_ASSERT(7 == out.nvlen);
   CU_ASSERT(nvnameeq("method", &out.nva[0]));
@@ -128,8 +130,10 @@ void test_nghttp2_frame_pack_headers()
                      1000000007, &oframe.hd);
   CU_ASSERT(1 << 20 == oframe.pri);
 
-  CU_ASSERT(framelen - 12 ==
-            inflate_hd(&inflater, &out, buf + 12, framelen - 12));
+  nv_offset = bufoff + NGHTTP2_FRAME_HEAD_LENGTH + 4;
+  CU_ASSERT(framelen - nv_offset ==
+            inflate_hd(&inflater, &out,
+                       buf + nv_offset, framelen - nv_offset));
 
   nghttp2_nv_array_sort(out.nva, out.nvlen);
   CU_ASSERT(nvnameeq("method", &out.nva[0]));
diff --git a/tests/nghttp2_session_test.c b/tests/nghttp2_session_test.c
index 8d457e67..c4b42e4a 100644
--- a/tests/nghttp2_session_test.c
+++ b/tests/nghttp2_session_test.c
@@ -797,6 +797,7 @@ void test_nghttp2_session_recv_premature_headers(void)
   my_user_data ud;
   nghttp2_hd_deflater deflater;
   nghttp2_outbound_item *item;
+  size_t bufoff = 0;
 
   memset(&callbacks, 0, sizeof(nghttp2_session_callbacks));
 
@@ -808,14 +809,16 @@ void test_nghttp2_session_recv_premature_headers(void)
   nghttp2_frame_headers_init(&frame.headers, NGHTTP2_FLAG_END_HEADERS,
                              1, NGHTTP2_PRI_DEFAULT, nva, nvlen);
   framedatalen = nghttp2_frame_pack_headers(&framedata, &framedatacap,
+                                            &bufoff,
                                             &frame.headers,
                                             &deflater);
   nghttp2_frame_headers_free(&frame.headers);
 
   /* Intentionally feed payload cutting last 1 byte off */
-  nghttp2_put_uint16be(framedata, frame.hd.length - 1);
-  rv = nghttp2_session_mem_recv(session, framedata, framedatalen - 1);
-  CU_ASSERT((ssize_t)framedatalen - 1 == rv);
+  nghttp2_put_uint16be(framedata + bufoff, frame.hd.length - 1);
+  rv = nghttp2_session_mem_recv(session, framedata + bufoff,
+                                framedatalen - bufoff - 1);
+  CU_ASSERT((ssize_t)framedatalen - bufoff - 1 == rv);
 
   item = nghttp2_session_get_next_ob_item(session);
   CU_ASSERT(NULL != item);