diff --git a/.rubocop_gradual.lock b/.rubocop_gradual.lock
index 7d421b0..dac37d7 100644
--- a/.rubocop_gradual.lock
+++ b/.rubocop_gradual.lock
@@ -22,14 +22,14 @@
     [50, 5, 269, "Style/ClassMethodsDefinitions: Use `class << self` to define a class method.", 4255608859],
     [71, 5, 614, "Style/ClassMethodsDefinitions: Use `class << self` to define a class method.", 574527918]
   ],
-  "lib/turbo_tests/runner.rb:3852406545": [
+  "lib/turbo_tests/runner.rb:1197951922": [
     [13, 5, 271, "Style/ClassMethodsDefinitions: Use `class << self` to define a class method.", 21989008],
     [20, 5, 1400, "Style/ClassMethodsDefinitions: Use `class << self` to define a class method.", 1925027850],
-    [245, 11, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
-    [264, 47, 6, "Style/GlobalStdStream: Use `$stderr` instead of `STDERR`.", 3356712163],
-    [266, 21, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
-    [275, 7, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
-    [335, 9, 6, "Style/GlobalStdStream: Use `$stdout` instead of `STDOUT`.", 3356722952]
+    [248, 11, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
+    [267, 47, 6, "Style/GlobalStdStream: Use `$stderr` instead of `STDERR`.", 3356712163],
+    [269, 21, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
+    [278, 7, 10, "ThreadSafety/NewThread: Avoid starting new threads.", 3411682361],
+    [338, 9, 6, "Style/GlobalStdStream: Use `$stdout` instead of `STDOUT`.", 3356722952]
   ],
   "spec/cli_spec.rb:3990998076": [
     [1, 1, 30, "RSpec/SpecFilePathFormat: Spec path should end with `turbo_tests/cli*_spec.rb`.", 965721356],
diff --git a/lib/turbo_tests/runner.rb b/lib/turbo_tests/runner.rb
index 1bb7117..49564fb 100644
--- a/lib/turbo_tests/runner.rb
+++ b/lib/turbo_tests/runner.rb
@@ -189,11 +189,14 @@ def start_subprocess(env, extra_args, tests, process_id, record_runtime:)
         env["RUBYOPT"] = ["-I#{File.expand_path("..", __dir__)}", ENV["RUBYOPT"]].compact.join(" ")
         env["RSPEC_SILENCE_FILTER_ANNOUNCEMENTS"] = "1"
 
-        command_name = if ENV["BUNDLE_BIN_PATH"]
-          [ENV["BUNDLE_BIN_PATH"], "exec", "rspec"]
-        else
-          "rspec"
-        end
+        command_name =
+          if ENV["RSPEC_EXECUTABLE"]
+            ENV["RSPEC_EXECUTABLE"].split
+          elsif ENV["BUNDLE_BIN_PATH"]
+            [ENV["BUNDLE_BIN_PATH"], "exec", "rspec"]
+          else
+            "rspec"
+          end
 
         record_runtime_options =
           if record_runtime