diff --git a/core/tests/run_tests.sh b/core/tests/run_tests.sh
index d89072e86..29d668333 100755
--- a/core/tests/run_tests.sh
+++ b/core/tests/run_tests.sh
@@ -3,7 +3,7 @@
 declare -a results
 declare -i PYOPT=1 passed=0 failed=0 exit_code=0
 declare COLOR_GREEN='\e[32m' COLOR_RED='\e[91m' COLOR_RESET='\e[39m'
-declare MICROPYTHON=../build/unix/micropython
+MICROPYTHON="${MICROPYTHON:-../build/unix/micropython}"
 
 print_summary() {
     echo
diff --git a/core/tests/run_tests_device_emu.sh b/core/tests/run_tests_device_emu.sh
index f290a3484..4ce02e27e 100755
--- a/core/tests/run_tests_device_emu.sh
+++ b/core/tests/run_tests_device_emu.sh
@@ -2,7 +2,7 @@
 
 SDIR="$(SHELL_SESSION_FILE='' && cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 CORE_DIR="$SDIR/.."
-MICROPYTHON="$CORE_DIR/build/unix/micropython"
+MICROPYTHON="${MICROPYTHON:-$CORE_DIR/build/unix/micropython}"
 RUN_TEST_EMU=1
 DISABLE_FADE=1
 PYOPT=0
diff --git a/core/tests/run_tests_device_emu_monero.sh b/core/tests/run_tests_device_emu_monero.sh
index 90659a152..3ba358308 100755
--- a/core/tests/run_tests_device_emu_monero.sh
+++ b/core/tests/run_tests_device_emu_monero.sh
@@ -6,7 +6,7 @@
 
 SDIR="$(SHELL_SESSION_FILE='' && cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 CORE_DIR="$SDIR/.."
-MICROPYTHON="$CORE_DIR/build/unix/micropython"
+MICROPYTHON="${MICROPYTHON:-$CORE_DIR/build/unix/micropython}"
 DISABLE_FADE=1
 PYOPT=0
 upy_pid=""
diff --git a/legacy/script/test b/legacy/script/test
index 5481d3d9f..e4f1758d9 100755
--- a/legacy/script/test
+++ b/legacy/script/test
@@ -2,6 +2,8 @@
 
 # script/test: Run test suite for application.
 
+EMULATOR_BINARY="${EMULATOR_BINARY:-firmware/trezor.elf}"
+
 set -e
 
 cd "$(dirname "$0")/.."
@@ -9,7 +11,7 @@ cd "$(dirname "$0")/.."
 if [ "$EMULATOR" = 1 ]; then
     trap "kill %1" EXIT
 
-    firmware/trezor.elf &
+    "${EMULATOR_BINARY}" &
     export TREZOR_PATH=udp:127.0.0.1:21324
     "${PYTHON:-python}" script/wait_for_emulator.py
 fi