diff --git a/test/force_key_frame_test.cc b/test/force_key_frame_test.cc
new file mode 100644
index 0000000..78662ed
--- /dev/null
+++ b/test/force_key_frame_test.cc
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2022, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+// Tests for https://crbug.com/aomedia/3327.
+//
+// In good-quality mode, set cfg.g_lag_in_frames to 1 or 0 and encode two
+// frames in one-pass mode. Pass AOM_EFLAG_FORCE_KF to the second
+// aom_codec_encode() call. Both frames should be encoded as key frames.
+
+#include <memory>
+
+#include "aom/aomcx.h"
+#include "aom/aom_encoder.h"
+#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
+
+namespace {
+
+TEST(ForceKeyFrameTest, OnePassMode) {
+  // A buffer of gray samples of size 128x128, YUV 4:2:0.
+  constexpr size_t kImageDataSize = 128 * 128 + 2 * 64 * 64;
+  std::unique_ptr<unsigned char[]> img_data(new unsigned char[kImageDataSize]);
+  ASSERT_NE(img_data, nullptr);
+  memset(img_data.get(), 128, kImageDataSize);
+
+  aom_codec_iface_t *iface = aom_codec_av1_cx();
+  aom_codec_enc_cfg_t cfg;
+  ASSERT_EQ(AOM_CODEC_OK,
+            aom_codec_enc_config_default(iface, &cfg, AOM_USAGE_GOOD_QUALITY));
+  cfg.g_w = 128;
+  cfg.g_h = 128;
+  cfg.g_pass = AOM_RC_ONE_PASS;
+  // TODO(crbug.com/aomedia/3327): Lower cfg.g_lag_in_frames to 1 or 0 to see
+  // the bug.
+  cfg.g_lag_in_frames = 2;
+  aom_codec_ctx_t enc;
+  EXPECT_EQ(AOM_CODEC_OK, aom_codec_enc_init(&enc, iface, &cfg, 0));
+
+  aom_image_t img;
+  EXPECT_EQ(&img,
+            aom_img_wrap(&img, AOM_IMG_FMT_I420, 128, 128, 1, img_data.get()));
+
+  aom_codec_iter_t iter;
+  const aom_codec_cx_pkt_t *pkt;
+  int frame_count = 0;
+
+  EXPECT_EQ(AOM_CODEC_OK, aom_codec_encode(&enc, &img, 0, 1, 0));
+
+  iter = nullptr;
+  while ((pkt = aom_codec_get_cx_data(&enc, &iter)) != nullptr) {
+    ASSERT_EQ(pkt->kind, AOM_CODEC_CX_FRAME_PKT);
+    EXPECT_NE(pkt->data.frame.flags & AOM_FRAME_IS_KEY, 0u)
+        << "frame " << frame_count;
+    frame_count++;
+  }
+
+  EXPECT_EQ(AOM_CODEC_OK,
+            aom_codec_encode(&enc, &img, 1, 1, AOM_EFLAG_FORCE_KF));
+
+  iter = nullptr;
+  while ((pkt = aom_codec_get_cx_data(&enc, &iter)) != nullptr) {
+    ASSERT_EQ(pkt->kind, AOM_CODEC_CX_FRAME_PKT);
+    EXPECT_NE(pkt->data.frame.flags & AOM_FRAME_IS_KEY, 0u)
+        << "frame " << frame_count;
+    frame_count++;
+  }
+
+  EXPECT_EQ(AOM_CODEC_OK, aom_codec_encode(&enc, nullptr, 0, 0, 0));
+
+  iter = nullptr;
+  while ((pkt = aom_codec_get_cx_data(&enc, &iter)) != nullptr) {
+    ASSERT_EQ(pkt->kind, AOM_CODEC_CX_FRAME_PKT);
+    EXPECT_NE(pkt->data.frame.flags & AOM_FRAME_IS_KEY, 0u)
+        << "frame " << frame_count;
+    frame_count++;
+  }
+
+  EXPECT_EQ(frame_count, 2);
+  EXPECT_EQ(AOM_CODEC_OK, aom_codec_destroy(&enc));
+}
+
+}  // namespace
diff --git a/test/test.cmake b/test/test.cmake
index 9ad832e..4857fc4 100644
--- a/test/test.cmake
+++ b/test/test.cmake
@@ -64,6 +64,7 @@
             "${AOM_ROOT}/test/encode_test_driver.cc"
             "${AOM_ROOT}/test/encode_test_driver.h"
             "${AOM_ROOT}/test/end_to_end_psnr_test.cc"
+            "${AOM_ROOT}/test/force_key_frame_test.cc"
             "${AOM_ROOT}/test/gf_pyr_height_test.cc"
             "${AOM_ROOT}/test/rt_end_to_end_test.cc"
             "${AOM_ROOT}/test/allintra_end_to_end_test.cc"
@@ -108,6 +109,7 @@
                    "${AOM_ROOT}/test/cpu_speed_test.cc"
                    "${AOM_ROOT}/test/cpu_used_firstpass_test.cc"
                    "${AOM_ROOT}/test/end_to_end_psnr_test.cc"
+                   "${AOM_ROOT}/test/force_key_frame_test.cc"
                    "${AOM_ROOT}/test/gf_pyr_height_test.cc"
                    "${AOM_ROOT}/test/horz_superres_test.cc"
                    "${AOM_ROOT}/test/level_test.cc"