diff --git a/info.rkt b/info.rkt
index 6f1776b..6bfd2cd 100644
--- a/info.rkt
+++ b/info.rkt
@@ -2,7 +2,7 @@
 (define name "cover")
 (define collection "cover")
 (define deps '("base" "errortrace-lib" "rackunit-lib"
-               "syntax-color-lib"))
+               "syntax-color-lib" "compiler-lib"))
 (define build-deps
   '("racket-doc" "scribble-lib" "typed-racket-doc"))
 
diff --git a/raco.rkt b/raco.rkt
index fcebfb5..0f6d47b 100644
--- a/raco.rkt
+++ b/raco.rkt
@@ -6,7 +6,10 @@
          racket/function
          "main.rkt"
          (only-in "private/contracts.rkt" coverage-gen/c)
-         "private/shared.rkt")
+         "private/shared.rkt"
+         (only-in (submod compiler/commands/test paths) collection-paths)
+         pkg/lib)
+
 
 (module+ test
   (require rackunit racket/runtime-path racket/set))
@@ -18,6 +21,7 @@
   (define exclude-paths '())
   (define include-exts '())
   (define submod 'test)
+  (define expansion-type 'dir)
 
   (define args
      (command-line
@@ -45,9 +49,20 @@
       [("-s" "--submodule") s
        "Run the given submodule instead of the test submodule"
        (set! submod (string->symbol s))]
+      #:once-any
+      [("-c" "--collection") "Interprets the arguments as collections whose content should be tested (in the same way as directory content)."
+       (set! expansion-type 'collection)]
+      [("-p" "--package") "Interprets the arguments as packages whose contents should be tested (in the same way as directory content)."
+       (set! expansion-type 'package)]
       #:args (file . files)
       (cons file files)))
-  (define files (expand-directories args include-exts))
+  (define path-expand
+    (case expansion-type
+      [(dir) expand-directories]
+      [(collection) (lambda (a b) (expand-directories (flatten (map collection-paths a)) b))]
+      [(package) (lambda (a b)
+                   (expand-directories (map pkg-directory a) b))]))
+  (define files (path-expand args include-exts))
   (define generate-coverage
     (hash-ref (get-formats) output-format
               (lambda _ (error 'cover "given unknown coverage output format: ~s" output-format))))
diff --git a/scribblings/basics.scrbl b/scribblings/basics.scrbl
index 3c6f1c2..49f90c2 100644
--- a/scribblings/basics.scrbl
+++ b/scribblings/basics.scrbl
@@ -38,4 +38,11 @@ The @exec{raco cover} command accepts the following flags:
                --- enable verbose logging}
          @item{@Flag{s} or @DFlag{submod}
                --- run the given submodule instead of the test submodule.}
-         ]
+         @item{@Flag{c} or @DFlag{collection}
+               --- Interprets the arguments as collections whose content should be
+               tested (in the same way as directory content).}
+         @item{@Flag{p} or @DFlag{package}
+               --- Interprets the arguments as packages whose contents should be tested
+               (in the same way as directory content). All package scopes are searched
+               for the first, most specific
+               @tech[#:doc '(lib "pkg/scribblings/pkg.scrbl")]{package scope}.}]