diff --git a/edg/parts/test_JlcCapacitor.py b/edg/parts/test_JlcCapacitor.py
index 9257d287b..edf660b46 100644
--- a/edg/parts/test_JlcCapacitor.py
+++ b/edg/parts/test_JlcCapacitor.py
@@ -40,7 +40,7 @@ def test_capacitor_part(self) -> None:
 
   def test_capacitor_min_package(self) -> None:
     compiled = ScalaCompiler.compile(JlcCapacitorTestTop, Refinements(
-      instance_values=[(['dut', 'footprint_area'], Range(4.0, float('inf')))]
+      instance_values=[(['dut', 'footprint_area'], Range.from_lower(4.0))]
     ))
     self.assertEqual(compiled.get_value(['dut', 'fp_footprint']), 'Capacitor_SMD:C_0603_1608Metric')
     self.assertEqual(compiled.get_value(['dut', 'fp_part']), '0603B103K500NT')
diff --git a/edg/parts/test_resistor.py b/edg/parts/test_resistor.py
index f8fdaf69e..ea96f5776 100644
--- a/edg/parts/test_resistor.py
+++ b/edg/parts/test_resistor.py
@@ -56,7 +56,7 @@ def test_non_e12_resistor(self) -> None:
 
   def test_min_package(self) -> None:
     compiled = ScalaCompiler.compile(ResistorTestTop, Refinements(
-      instance_values=[(['dut', 'footprint_area'], Range(4.0, float('inf')))]
+      instance_values=[(['dut', 'footprint_area'], Range.from_lower(4.0))]
     ))
     self.assertEqual(compiled.get_value(['dut', 'fp_footprint']), 'Resistor_SMD:R_0603_1608Metric')
     self.assertEqual(compiled.get_value(['dut', 'fp_value']), '1k, 1%, 0.1 W')