Readme.md in parallel_tests-3.2.0 vs Readme.md in parallel_tests-3.3.0

@@ -203,10 +203,12 @@
           filesize - by size of the file
           runtime - info from runtime log
           default - runtime when runtime log is filled otherwise filesize
     -m, --multiply-processes [FLOAT] use given number as a multiplier of processes to run
     -s, --single [PATTERN]           Run all matching files in the same process
-    -i, --isolate                    Do not run any other tests in the group used by --single(-s)
+    -i, --isolate                    Do not run any other tests in the group used by --single(-s). 
+                                     Automatically turned on if --isolate-n is set above 0.
+        --isolate-n                  Number of processes for isolated groups. Default to 1 when --isolate is on. 
         --only-group INT[, INT]
     -e, --exec [COMMAND]             execute this code parallel and with ENV['TEST_ENV_NUMBER']
     -o, --test-options '[OPTIONS]'   execute test commands with those options
     -t, --type [TYPE]                test(default) / rspec / cucumber / spinach
         --suffix [PATTERN]           override built in test file pattern (should match suffix):