diff --git a/sr-data/src/sr_data/steps/workflows.py b/sr-data/src/sr_data/steps/workflows.py
index 7bed0d9..9d8ca72 100644
--- a/sr-data/src/sr_data/steps/workflows.py
+++ b/sr-data/src/sr_data/steps/workflows.py
@@ -103,7 +103,11 @@ def workflow_info(content):
                         if len(keys) == 1:
                             if matrix.get(keys[0]):
                                 for matrixed in matrix.get(keys[0]):
-                                    oss.append(matrixed)
+                                    if isinstance(matrixed, list):
+                                        for r in matrixed:
+                                            oss.append(r)
+                                    else:
+                                        oss.append(matrixed)
                         elif len(keys) > 1:
                             for system in dot_values(keys, matrix):
                                 oss.append(system)
diff --git a/sr-data/src/tests/test_workflows.py b/sr-data/src/tests/test_workflows.py
index 6234be8..c2666d5 100644
--- a/sr-data/src/tests/test_workflows.py
+++ b/sr-data/src/tests/test_workflows.py
@@ -369,3 +369,34 @@ def test_parses_none_matrix(self):
             0,
             f"Steps count in workflow: '{info}' does not match with expected"
         )
+
+    @pytest.mark.fast
+    def test_parses_oss_as_list_in_matrix(self):
+        info = workflow_info(
+            """
+name: test
+on: push
+jobs:
+  build:
+    strategy:
+      matrix:
+        os:
+          - [self-hosted]          
+    runs-on: ${{ matrix.os }}
+            """
+        )
+        self.assertEqual(
+            info["w_oss"],
+            ["self-hosted"],
+            f"Workflow OSs: '{info}' does not match with expected"
+        )
+        self.assertEqual(
+            info["w_jobs"],
+            1,
+            f"Jobs count in workflow: '{info}' does not match with expected"
+        )
+        self.assertEqual(
+            info["w_steps"],
+            0,
+            f"Steps count in workflow: '{info}' does not match with expected"
+        )