diff --git a/resolwe/flow/management/commands/test_data_output.py b/resolwe/flow/management/commands/test_data_output.py
new file mode 100644
index 000000000..f6ce19e42
--- /dev/null
+++ b/resolwe/flow/management/commands/test_data_output.py
@@ -0,0 +1,83 @@
+""".. Ignore pydocstyle D400.
+
+==============================================================
+Test if required file outputs of completed Data objects exists
+==============================================================
+
+Command to run on local machine::
+
+    ./manage.py test_data_output
+
+"""
+from pathlib import Path
+from typing import Set
+
+from django.core.management.base import BaseCommand
+
+from resolwe.flow.models import Data
+from resolwe.flow.utils import iterate_fields
+
+
+class Command(BaseCommand):
+    """Test if file outputs of completed Data objects exists."""
+
+    help = "Test if required file outputs of completed Data objects exists."
+
+    def get_files_dirs(self, output: dict, output_schema: dict) -> Set[Path]:
+        """Get a set of required files and dirs for a given output."""
+        paths_to_check: Set[Path] = set()
+        for field_schema, fields in iterate_fields(output, output_schema):
+            name = field_schema["name"]
+            value = fields[name]
+            if "type" in field_schema and field_schema.get("required", False):
+                if field_schema["type"].startswith("basic:file:"):
+                    paths_to_check.add(Path(value["file"]))
+                    # paths_to_check.update(Path(ref) for ref in value.get("refs", []))
+
+                elif field_schema["type"].startswith("list:basic:file:"):
+                    for obj in value:
+                        paths_to_check.add(Path(obj["file"]))
+                        # paths_to_check.update(Path(ref) for ref in obj.get("refs", []))
+
+                # if field_schema["type"].startswith("basic:dir:"):
+                #     paths_to_check.add(Path(value["dir"]))
+                #     paths_to_check.update(Path(ref) for ref in value.get("refs", []))
+
+                # elif field_schema["type"].startswith("list:basic:dir:"):
+                #     for obj in value:
+                #         paths_to_check.add(Path(obj["dir"]))
+                #         paths_to_check.update(Path(ref) for ref in obj.get("refs", []))
+
+        return paths_to_check
+
+    def check_output(self, data: Data) -> bool:
+        """Check if all file outputs defined in output exist."""
+        print(f"Checking data {data}, {data.pk}.")
+        assert data.status == Data.STATUS_DONE, (
+            f"Data with id {data.id} has invalid status"
+            "{data.status}, expected {Data.STATUS_DONE}."
+        )
+        base_path = Path(data.location.subpath)
+        paths = self.get_files_dirs(data.output, data.process.output_schema)
+        for storage_location in data.location.storage_locations.exclude(
+            connector_name="backup"
+        ):
+            for path in paths:
+                path = base_path / path
+                print(f"Checking {path}, location {storage_location}.")
+                if not storage_location.connector.exists(path):
+                    print(
+                        f"File {path} is missing on Data objects with id "
+                        f"{data.pk}, storage location {storage_location}."
+                    )
+                    return False
+        return True
+
+    def handle(self, *args, **kwargs):
+        """Run test."""
+        for data in Data.objects.filter(status=Data.STATUS_DONE).exclude(
+            location__isnull=True
+        ):
+            if not self.check_output(data):
+                return
+        print("Check successfull.")