diff --git a/src/openeo_test_suite/lib/internal-tests/test_process_selection.py b/src/openeo_test_suite/lib/internal-tests/test_process_selection.py
index 25d30f2..9df9a76 100644
--- a/src/openeo_test_suite/lib/internal-tests/test_process_selection.py
+++ b/src/openeo_test_suite/lib/internal-tests/test_process_selection.py
@@ -1,4 +1,4 @@
-from openeo_test_suite.lib.process_selection import csv_to_list
+from openeo_test_suite.lib.process_selection import csv_to_list, get_selected_processes
 
 
 def test_csv_to_list():
@@ -18,3 +18,12 @@ def test_csv_to_list_none_on_empty():
     assert csv_to_list("", none_on_empty=True) is None
     assert csv_to_list("   ", none_on_empty=True) is None
     assert csv_to_list(" ,  ", none_on_empty=True) is None
+
+
+def test_get_selected_processes_caching():
+    processes = get_selected_processes()
+    assert len(processes) > 0
+
+    processes2 = get_selected_processes()
+    assert processes2 is processes
+    assert len(processes2) > 0
diff --git a/src/openeo_test_suite/lib/process_registry.py b/src/openeo_test_suite/lib/process_registry.py
index 25b1a62..eea2ca4 100644
--- a/src/openeo_test_suite/lib/process_registry.py
+++ b/src/openeo_test_suite/lib/process_registry.py
@@ -91,7 +91,7 @@ def get_processes_filtered(
         process_ids: Optional[List[str]] = None,
         process_levels: Optional[List[str]] = None,
         experimental: bool = False,
-    ) -> Iterable[ProcessData]:
+    ) -> Iterator[ProcessData]:
         """
         Collect processes matching with additional filtering:
 
diff --git a/src/openeo_test_suite/lib/process_selection.py b/src/openeo_test_suite/lib/process_selection.py
index e744a68..996adf0 100644
--- a/src/openeo_test_suite/lib/process_selection.py
+++ b/src/openeo_test_suite/lib/process_selection.py
@@ -42,7 +42,7 @@ def set_process_selection_from_config(config: pytest.Config):
 
 # TODO: more structural/testable solution for get_selected_processes related caching?
 @functools.lru_cache()
-def get_selected_processes() -> Iterable[ProcessData]:
+def get_selected_processes() -> List[ProcessData]:
     """
     Get effective list of processes extracted from the process registry
     with filtering based on command line options
@@ -51,10 +51,12 @@ def get_selected_processes() -> Iterable[ProcessData]:
     global _process_filters
     assert isinstance(_process_filters, ProcessFilters)
 
-    return ProcessRegistry().get_processes_filtered(
-        process_ids=_process_filters.process_ids,
-        process_levels=_process_filters.process_levels,
-        experimental=_process_filters.experimental,
+    return list(
+        ProcessRegistry().get_processes_filtered(
+            process_ids=_process_filters.process_ids,
+            process_levels=_process_filters.process_levels,
+            experimental=_process_filters.experimental,
+        )
     )