diff --git a/test/functional/api/cas/cache.py b/test/functional/api/cas/cache.py
index 811217a..9395d84 100644
--- a/test/functional/api/cas/cache.py
+++ b/test/functional/api/cas/cache.py
@@ -139,8 +139,8 @@ class Cache:
     def load_io_class(self, file_path: str):
         return casadm.load_io_classes(self.cache_id, file_path)
 
-    def list_io_classes(self, output_format: OutputFormat):
-        return casadm.list_io_classes(self.cache_id, output_format)
+    def list_io_classes(self):
+        return get_io_class_list(self.cache_id)
 
     def set_seq_cutoff_parameters(self, seq_cutoff_param: SeqCutOffParameters):
         return casadm.set_param_cutoff(self.cache_id,
diff --git a/test/functional/api/cas/casadm_parser.py b/test/functional/api/cas/casadm_parser.py
index 399c698..2699da5 100644
--- a/test/functional/api/cas/casadm_parser.py
+++ b/test/functional/api/cas/casadm_parser.py
@@ -275,3 +275,19 @@ def get_casadm_version():
     casadm_output = casadm.print_version(OutputFormat.csv).stdout.split('\n')
     version_str = casadm_output[1].split(',')[-1]
     return CasVersion.from_version_string(version_str)
+
+
+def get_io_class_list(cache_id: int):
+    ret = []
+    casadm_output = casadm.list_io_classes(cache_id, OutputFormat.csv).stdout.splitlines()
+    casadm_output.pop(0)  # Remove header
+    for line in casadm_output:
+        values = line.split(",")
+        ioclass = {
+            "id": int(values[0]),
+            "rule": values[1],
+            "eviction_priority": int(values[2]),
+            "allocation": float(values[3]),
+        }
+        ret.append(ioclass)
+    return ret