diff --git a/test/motor.jl b/test/motor.jl
index d991f66a..0d63f982 100644
--- a/test/motor.jl
+++ b/test/motor.jl
@@ -1,9 +1,12 @@
 using ModelingToolkit, Test
+using ModelingToolkitBase: @independent_variables
 using SciCompDSL
 using SciMLBase
 using ModelingToolkitStandardLibrary.Thermal
 using ModelingToolkitStandardLibrary.Blocks
 
+@independent_variables t
+
 # https://doc.modelica.org/Modelica%204.0.0/Resources/helpWSM/Modelica/Modelica.Thermal.HeatTransfer.Examples.Motor.html
 
 @testset "Thermal Motor Demo" begin