diff --git a/tests/problems/base/test_general_problem.py b/tests/problems/base/test_general_problem.py
index d7d785893..869b0ea7f 100644
--- a/tests/problems/base/test_general_problem.py
+++ b/tests/problems/base/test_general_problem.py
@@ -30,18 +30,28 @@ def test_simple_run(self, adata_x: AnnData, adata_y: AnnData):
 
         assert isinstance(prob.solution, BaseDiscreteSolverOutput)
 
-    @pytest.mark.parametrize("kind", ["linear", "quadratic"])
-    def test_unrecognized_args(self, adata_x: AnnData, adata_y: AnnData, kind: Literal["linear", "quadratic"]):
+    @pytest.mark.parametrize(
+        ("kind", "rank"),
+        [
+            ("linear", -1),
+            ("linear", 5),
+            ("quadratic", -1),
+            ("quadratic", 5),
+        ],
+    )
+    def test_unrecognized_args(
+        self, adata_x: AnnData, adata_y: AnnData, kind: Literal["linear", "quadratic"], rank: int
+    ):
         prob = OTProblem(adata_x, adata_y)
         data = {
             "xy": {"x_attr": "obsm", "x_key": "X_pca", "y_attr": "obsm", "y_key": "X_pca"},
         }
-        if kind == "quadratic":
+        if "quadratic" in kind:
             data["x"] = {"attr": "X"}
             data["y"] = {"attr": "X"}
 
         with pytest.raises(TypeError):
-            prob.prepare(**data).solve(epsilon=5e-1, dummy=42)
+            prob.prepare(**data).solve(epsilon=5e-1, rank=rank, dummy=42)
 
     @pytest.mark.fast
     def test_output(self, adata_x: AnnData, x: Geom_t):