diff --git a/src/weller/filters.clj b/src/weller/filters.clj
index 90a2f76..8f63e3a 100644
--- a/src/weller/filters.clj
+++ b/src/weller/filters.clj
@@ -101,12 +101,12 @@
 (defn is-file?
   "Checks if an event corresponds to a repository node of type *cm:content* or subtype (i.e. a file)."
   []
-  )
+  (partial #(get-in % [:data :resource :is-file])))
 
 (defn is-folder?
   "Checks if an event corresponds to a repository node of type *cm:folder* or subtype (i.e. a folder)."
   []
-  (partial #(= (get-in % [:data :resource :is-folder]) true)))
+  (partial #(get-in % [:data :resource :is-folder])))
 
 (defn mime-type?
   "Checks if an event represents a content node (i.e. *cm:content*) with a specific MIME type."
diff --git a/test/weller/filters_test.clj b/test/weller/filters_test.clj
index 0ebf887..61b6196 100644
--- a/test/weller/filters_test.clj
+++ b/test/weller/filters_test.clj
@@ -63,6 +63,20 @@
     (not (nil? @result))
     (component/stop handler)))
 
+(deftest is-file-test
+  (let [result (promise)
+        handler (handler/make-handler (filters/is-file?) #(deliver result %))]
+    (tu/create-then-update-then-delete-node)
+    (is (:is-file @result))
+    (component/stop handler)))
+
+(deftest is-folder-test
+  (let [result (promise)
+        handler (handler/make-handler (filters/is-folder?) #(deliver result %))]
+    (tu/create-then-update-then-delete-node)
+    (is (:is-folder @result))
+    (component/stop handler)))
+
 (deftest mime-type-test
   (let [result (promise)
         handler (handler/make-handler (filters/mime-type? "text/plain") #(deliver result %))]