diff --git a/test/determinism/test_bytecode_determinism.sh b/test/determinism/test_bytecode_determinism.sh
new file mode 100755
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+++ b/test/determinism/test_bytecode_determinism.sh
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+# This test compiles hermes bytecode from a large js bundle several times and
+# verifies that the output is always the same.
+
+set -x -e -o pipefail
+
+exec 2>&1
+
+# hermesc binary
+HERMESC=$1
+# Path to the large js bundle.
+JS_BUNDLE=$2
+# Number of iterations that we compile from the same source and compare.
+NUM_COMP=5
+
+FIRST_HBC="$(mktemp)" || { echo "Failed to create first hbc temp file"; exit 1; }
+# Compile first bytecode.
+"$HERMESC" -O -target=HBC -emit-binary -Wno-undefined-variable -out "$FIRST_HBC" "$JS_BUNDLE" 2>/dev/null
+
+SECOND_HBC="$(mktemp)" || { echo "Failed to create second hbc temp file"; exit 1; }
+for (( i=1; i<=$((NUM_COMP)); i++ ))
+do
+    # Compile second bytecode.
+    "$HERMESC" -O -target=HBC -emit-binary -Wno-undefined-variable -out "$SECOND_HBC" "$JS_BUNDLE" 2>/dev/null
+    # Exits with non-zero status if the bytecode files differ.
+    diff "$FIRST_HBC" "$SECOND_HBC" || { echo "Bytecode diff failed with status $?."; exit 1; }
+done
+echo "Bytecode looks deterministic. Success!"