diff --git a/README.md b/README.md
index 464a06d..d88e147 100644
--- a/README.md
+++ b/README.md
@@ -27,17 +27,19 @@ The project was initially developed for Mac OS X, and then tested on Linux.
 
 For those implemented options, safe-rm will act **exactly the same** as the original `rm` command
 
-`-i`, `--interactive`
+`-i`, `--interactive`: Prompts you to confirm before removing each file.
 
-`-I`, `--interactive=once`
+`-I`, `--interactive=once`: Prompts only once before removing more than three files or when recursively removing directories.
 
-`-f`, `--force`
+`-f`, `--force`: Removes files without prompting for confirmation, ignoring nonexistent files and overriding file protections
 
-`-r`, `-R`, `--recursive`, `--Recursive`
+`-r`, `-R`, `--recursive`, `--Recursive`: Removes directories and their contents recursively. Required for deleting directories.
 
-`-v`, `--verbose`
+`-v`, `--verbose`: Displays detailed information about each file or directory being removed.
 
-`--`
+`-d`, '--directory': Removes empty directories. `safe-rm` can handle empty directories specifically with this flag.
+
+`--`: Used to indicate the end of options. Useful if a filename starts with a `-`.
 
 Combined short options are also supported, such as
 
diff --git a/test/cases.js b/test/cases.js
index bded17e..cfecf8c 100644
--- a/test/cases.js
+++ b/test/cases.js
@@ -1,6 +1,7 @@
 const path = require('path')
 const {v4: uuid} = require('uuid')
 const delay = require('delay')
+const log = require('util').debuglog('safe-rm')
 
 const {
   generateContextMethods,
@@ -219,6 +220,8 @@ module.exports = (
     const dirpath = await createDir()
     const result1 = await runRm([dirpath])
 
+    log('rm a dir without -d', result1)
+
     t.is(result1.code, 1, 'exit code should be 1')
     t.true(result1.stderr.includes('is a directory'), 'stderr should include "is a directory"')