diff --git a/python/sdist/amici/petab/conditions.py b/python/sdist/amici/petab/conditions.py
index 08c2f90302..6538f9ef3d 100644
--- a/python/sdist/amici/petab/conditions.py
+++ b/python/sdist/amici/petab/conditions.py
@@ -41,6 +41,7 @@ def fill_in_parameters(
     scaled_parameters: bool,
     parameter_mapping: ParameterMapping,
     amici_model: AmiciModel,
+    warn_unused: bool = True,
 ) -> None:
     """Fill fixed and dynamic parameters into the edatas (in-place).
 
@@ -59,9 +60,15 @@ def fill_in_parameters(
         Parameter mapping for all conditions.
     :param amici_model:
         AMICI model.
+    :param warn_unused:
+        Whether a warning should be emitted if not all problem parameters
+        were used. I.e., if there are parameters in `problem_parameters`
+        that are not in `parameter_mapping`.
     """
-    if unused_parameters := (
-        set(problem_parameters.keys()) - parameter_mapping.free_symbols
+    if warn_unused and (
+        unused_parameters := (
+            set(problem_parameters.keys()) - parameter_mapping.free_symbols
+        )
     ):
         warnings.warn(
             "The following problem parameters were not used: "