diff --git a/tests/samples/2ch-44100Hz.ac3 b/tests/samples/2ch-44100Hz.ac3
new file mode 100644
index 0000000..30e21bb
Binary files /dev/null and b/tests/samples/2ch-44100Hz.ac3 differ
diff --git a/tests/test-audio-info.cc b/tests/test-audio-info.cc
index f9dfab1..9991eae 100644
--- a/tests/test-audio-info.cc
+++ b/tests/test-audio-info.cc
@@ -53,6 +53,7 @@ void test_audio_info()
     const double MP3_T = 5.0 * 1152 / 44100; // 5 frames * duration per mp3 frame
     const double AAC_T = (10240 + 628) / 2.0 / 44100;
     const double DCA_T = 8.0 * 21180 / 1411216; // file size / bit rate
+    const double AC3_T = 8.0 * 2490 / 190764; // file size / bit rate
 
     std::map<std::string, FileInfo> files = {
         {"no.file", {AudioError::CANNOT_OPEN_FILE, "", 0, 0, 0, 0, 0.0}},
@@ -70,6 +71,7 @@ void test_audio_info()
         {"2ch-44100Hz-q100.m4a", {AudioError::OK, "AAC", 159649, 44100, 0, 2, AAC_T}},
         {"2ch-44100Hz-q5.ogg", {AudioError::OK, "Vorbis", 160000, 44100, 0, 2, 0.1}},
         {"2ch-44100Hz.dts", {AudioError::OK, "DCA", 1411200, 44100, 0, 2, DCA_T}},
+        {"2ch-44100Hz.ac3", {AudioError::OK, "ATSC A/52", 192000, 44100, 0, 2, AC3_T}},
     };
     for (const auto& item : files) {
         run(
diff --git a/tests/test-audio-read.cc b/tests/test-audio-read.cc
index ed3e38f..0622788 100644
--- a/tests/test-audio-read.cc
+++ b/tests/test-audio-read.cc
@@ -61,6 +61,7 @@ void test_audio_read()
         {"2ch-44100Hz-q100.m4a", 10240},
         {"2ch-44100Hz-q5.ogg", 2 * 1024 * 4 + 1152},
         {"2ch-44100Hz.dts", 10240},
+        {"2ch-44100Hz.ac3", 9 * 1024},
     };
     for (const auto& item : files) {
         run(