diff --git a/test/test_signatures.py b/test/test_signatures.py
index 8ac34e72c..8c068cac9 100644
--- a/test/test_signatures.py
+++ b/test/test_signatures.py
@@ -18,7 +18,9 @@
 
 def generate_kernel(forms, scalar_type, options):
     """Generate kernel for given forms."""
-    compiled_forms, module, code = ffcx.codegeneration.jit.compile_forms(forms)
+    compiled_forms, module, code = ffcx.codegeneration.jit.compile_forms(
+        forms, options={"scalar_type": scalar_type}
+    )
 
     for f, compiled_f in zip(forms, compiled_forms):
         assert compiled_f.rank == len(f.arguments())