diff --git a/tests/test_support/audio_support.cc b/tests/test_support/audio_support.cc
index c26022e9..5f50d035 100644
--- a/tests/test_support/audio_support.cc
+++ b/tests/test_support/audio_support.cc
@@ -16,6 +16,7 @@
 // along with arc_unpacker. If not, see <http://www.gnu.org/licenses/>.
 
 #include "test_support/audio_support.h"
+#include <cstdlib>
 #include "algo/format.h"
 #include "algo/range.h"
 #include "dec/microsoft/wav_audio_decoder.h"
@@ -44,13 +45,42 @@ res::Audio tests::get_test_audio()
 void tests::compare_audio(
     const res::Audio &actual, const res::Audio &expected)
 {
+    // Allow for minor variances in audio samples within the specified
+    // threshold. Floating point calculations in some audio decoders yields
+    // slightly differing results across different CPU architectures.
+    //
+    // Affected tests:
+    //   * tests/dec/cri/hca_audio_decoder_test.cc
+    //   * tests/dec/entis/mio_audio_decoder_test.cc
+    static constexpr int tolerance = 1;
+
     REQUIRE(actual.codec == expected.codec);
     REQUIRE(actual.channel_count == expected.channel_count);
     REQUIRE(actual.sample_rate == expected.sample_rate);
     REQUIRE(actual.bits_per_sample == expected.bits_per_sample);
     REQUIRE(actual.extra_codec_headers == expected.extra_codec_headers);
     REQUIRE(actual.samples.size() == expected.samples.size());
+
+#ifdef __x86_64__
     tests::compare_binary(actual.samples, expected.samples);
+#else
+    tests::compare_binary(
+      actual.samples,
+      expected.samples,
+      [](const bstr& bytes1, const bstr& bytes2) -> bool {
+        const auto samples1 = reinterpret_cast<const s16*>(bytes1.c_str());
+        const auto samples2 = reinterpret_cast<const s16*>(bytes2.c_str());
+        const auto n_samples = bytes1.size() / sizeof(*samples1);
+        // algo::range is a bit incomplete to work with std::all_of
+        for (const int i : algo::range(n_samples)) {
+          if (std::abs(samples1[i] - samples2[i]) > tolerance) {
+            return false;
+          }
+        }
+        return true;
+      }
+    );
+#endif
 
     REQUIRE(actual.loops.size() == expected.loops.size());
     for (const auto i : algo::range(expected.loops.size()))
diff --git a/tests/test_support/common.cc b/tests/test_support/common.cc
index b63ffa89..265ef7b1 100644
--- a/tests/test_support/common.cc
+++ b/tests/test_support/common.cc
@@ -40,3 +40,19 @@ void au::tests::compare_binary(const bstr &actual, const bstr &expected)
     INFO(actual_dump << " != " << expected_dump);
     REQUIRE(actual == expected);
 }
+
+void au::tests::compare_binary(
+    const bstr &actual,
+    const bstr &expected,
+    std::function<bool(const bstr &, const bstr &)> compare)
+{
+    const auto max_size = 10000;
+    auto actual_dump = algo::hex(actual);
+    auto expected_dump = algo::hex(expected);
+    if (actual_dump.size() > max_size)
+        actual_dump = actual_dump.substr(0, max_size) + "(...)";
+    if (expected_dump.size() > max_size)
+        expected_dump = expected_dump.substr(0, max_size) + "(...)";
+    INFO(actual_dump << " != " << expected_dump);
+    REQUIRE(compare(actual, expected));
+}
diff --git a/tests/test_support/common.h b/tests/test_support/common.h
index 7d8be579..ecd5dcf8 100644
--- a/tests/test_support/common.h
+++ b/tests/test_support/common.h
@@ -17,6 +17,7 @@
 
 #pragma once
 
+#include <functional>
 #include "io/path.h"
 #include "types.h"
 
@@ -27,4 +28,9 @@ namespace tests {
 
     void compare_binary(const bstr &actual, const bstr &expected);
 
+    void compare_binary(
+        const bstr &actual,
+        const bstr &expected,
+        std::function<bool(const bstr &, const bstr &)> compare);
+
 } }