diff --git a/CMakeLists.txt b/CMakeLists.txt
index 805e67cde..30854a322 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -412,14 +412,14 @@ if ("${TEST_MANUAL_SCREENS}" MATCHES "1")
 endif()
 
 add_custom_target(check-integration
-    ${CMAKE_COMMAND} -E env CMAKE_BINARY_DIR='${CMAKE_BINARY_DIR}' ${TESTS_RUN_ENV} ./tests/run.sh \$\${TEST_RUN_ARGS:--W}
+    ${CMAKE_COMMAND} -E env CMAKE_BINARY_DIR='${CMAKE_BINARY_DIR}' LUA_EXECUTABLE='${LUA_EXECUTABLE}' ${TESTS_RUN_ENV} ./tests/run.sh \$\${TEST_RUN_ARGS:--W}
     WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
     COMMENT "Running integration tests"
     DEPENDS ${PROJECT_AWE_NAME}
     USES_TERMINAL)
 add_dependencies(check-integration test-gravity)
 add_custom_target(check-themes
-    ${CMAKE_COMMAND} -E env CMAKE_BINARY_DIR='${CMAKE_BINARY_DIR}' ${TESTS_RUN_ENV} ./tests/themes/run.sh
+    ${CMAKE_COMMAND} -E env CMAKE_BINARY_DIR='${CMAKE_BINARY_DIR}' LUA_EXECUTABLE='${LUA_EXECUTABLE}' ${TESTS_RUN_ENV} ./tests/themes/run.sh
     WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
     COMMENT "Testing themes"
     USES_TERMINAL
diff --git a/tests/_client.lua b/tests/_client.lua
index 31b9c6188..b06b6f60f 100644
--- a/tests/_client.lua
+++ b/tests/_client.lua
@@ -106,7 +106,7 @@ local pipe
 local function init()
     if initialized then return end
     initialized = true
-    local cmd = { "lua", "-e", test_client_source }
+    local cmd = { os.getenv("LUA_EXECUTABLE"), "-e", test_client_source }
     local _, _, stdin, stdout, stderr = awesome.spawn(cmd, false, true, true, true)
     pipe = Gio.UnixOutputStream.new(stdin, true)
     stdout = Gio.UnixInputStream.new(stdout, true)
diff --git a/tests/test-selection-getter.lua b/tests/test-selection-getter.lua
index 682dbc812..0c8fbdbc7 100644
--- a/tests/test-selection-getter.lua
+++ b/tests/test-selection-getter.lua
@@ -48,7 +48,7 @@ runner.run_steps{
 
     -- Clear the clipboard to get to a known state
     function()
-        spawn.with_line_callback({ "lua", "-e", acquire_and_clear_clipboard },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", acquire_and_clear_clipboard },
             { exit = function() continue = true end })
         return true
     end,
@@ -79,7 +79,7 @@ runner.run_steps{
 
         -- Now set the clipboard to some text
         continue = false
-        spawn.with_line_callback({ "lua", "-e", acquire_clipboard_text },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", acquire_clipboard_text },
             { stdout = function(line)
                 assert(line == "initialisation done",
                     "Unexpected line: " .. line)
@@ -143,7 +143,7 @@ runner.run_steps{
 
         -- Now set the clipboard to an image
         continue = false
-        spawn.with_line_callback({ "lua", "-e", acquire_clipboard_pixbuf },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", acquire_clipboard_pixbuf },
             { stdout = function(line)
                 assert(line == "initialisation done",
                     "Unexpected line: " .. line)
diff --git a/tests/test-selection-transfer.lua b/tests/test-selection-transfer.lua
index 506eca267..d3d5936f3 100644
--- a/tests/test-selection-transfer.lua
+++ b/tests/test-selection-transfer.lua
@@ -86,7 +86,7 @@ runner.run_steps({
             end
         end)
         awesome.sync()
-        spawn.with_line_callback({ "lua", "-e", check_targets_and_text },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", check_targets_and_text },
             { stdout = function(line)
                 assert(line == "done", "Unexpected line: " .. line)
                 continue = true
@@ -124,7 +124,7 @@ runner.run_steps({
             end
         end)
         awesome.sync()
-        spawn.with_line_callback({ "lua", "-e", check_targets_and_text },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", check_targets_and_text },
             { stdout = function(line)
                 assert(line == "done", "Unexpected line: " .. line)
                 continue = true
@@ -161,7 +161,7 @@ runner.run_steps({
             end
         end)
         awesome.sync()
-        spawn.with_line_callback({ "lua", "-e", check_large_transfer },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", check_large_transfer },
             { stdout = function(line)
                 assert(line == "done", "Unexpected line: " .. line)
                 continue = true
@@ -177,7 +177,7 @@ runner.run_steps({
         -- Now test that :release() works
         selection_object:release()
         awesome.sync()
-        spawn.with_line_callback({ "lua", "-e", check_empty_selection },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", check_empty_selection },
             { stdout = function(line)
                 assert(line == "done", "Unexpected line: " .. line)
                 continue = true
@@ -196,7 +196,7 @@ runner.run_steps({
             "Failed to acquire the clipboard selection")
         selection_object:connect_signal("release", function() selection_released = true end)
         awesome.sync()
-        spawn.with_line_callback({ "lua", "-e", acquire_and_clear_clipboard },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", acquire_and_clear_clipboard },
             { exit = function() continue = true end })
         return true
     end,
diff --git a/tests/test-selection-watcher.lua b/tests/test-selection-watcher.lua
index 6142cf707..b58552461 100644
--- a/tests/test-selection-watcher.lua
+++ b/tests/test-selection-watcher.lua
@@ -62,7 +62,7 @@ runner.run_steps{
     -- Clear the clipboard to get to a known state
     function()
         check_state(0, 0)
-        spawn.with_line_callback({ "lua", "-e", acquire_and_clear_clipboard },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", acquire_and_clear_clipboard },
             { exit = function() continue = true end })
         return true
     end,
@@ -81,7 +81,7 @@ runner.run_steps{
 
         -- Set the clipboard
         continue = false
-        spawn.with_line_callback({ "lua", "-e", acquire_clipboard },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", acquire_clipboard },
             { stdout = function(line)
                 assert(line == "initialisation done",
                     "Unexpected line: " .. line)
@@ -100,7 +100,7 @@ runner.run_steps{
 
         -- Now clear the clipboard again
         continue = false
-        spawn.with_line_callback({ "lua", "-e", acquire_and_clear_clipboard },
+        spawn.with_line_callback({ os.getenv("LUA_EXECUTABLE"), "-e", acquire_and_clear_clipboard },
             { exit = function() continue = true end })
 
         return true
diff --git a/tests/test-spawn.lua b/tests/test-spawn.lua
index 4fb9ffb96..8c725eb9b 100644
--- a/tests/test-spawn.lua
+++ b/tests/test-spawn.lua
@@ -11,7 +11,7 @@ local exit_yay, exit_snd = nil, nil
 -- * spawn with startup notification is covered by test-spawn-snid.lua
 
 local tiny_client = function(class)
-    return {"lua", "-e", [[
+    return {os.getenv("LUA_EXECUTABLE"), "-e", [[
 local lgi = require 'lgi'
 local Gtk = lgi.require('Gtk')
 local class = ']]..class..[['
diff --git a/tests/test-titlebar.lua b/tests/test-titlebar.lua
index 9359ce8b9..5df1a2fda 100644
--- a/tests/test-titlebar.lua
+++ b/tests/test-titlebar.lua
@@ -18,8 +18,8 @@ function app:on_activate()
 end
 app:run {''}
 ]]
-local tiny_client = {"lua", "-e", string.format(tiny_client_code_template, "")}
-local tiny_client_undecorated = {"lua", "-e",
+local tiny_client = {os.getenv("LUA_EXECUTABLE"), "-e", string.format(tiny_client_code_template, "")}
+local tiny_client_undecorated = {os.getenv("LUA_EXECUTABLE"), "-e",
     string.format(tiny_client_code_template, [[
 window.decorated = false
 ]])