diff --git a/tests/analysis/test_analysis_nanopore.py b/tests/analysis/test_analysis_nanopore.py
index bd4499ca..e06059cc 100644
--- a/tests/analysis/test_analysis_nanopore.py
+++ b/tests/analysis/test_analysis_nanopore.py
@@ -15,7 +15,7 @@
 )
 
 
-def build_run_properties() -> dict:
+def build_run_properties() -> list[dict]:
     """In order to parametrize the test in a comprehensive way, the parametrization is
     tabulated as a string here.
     """