diff --git a/test/downstream/ensemble_multi_prob.jl b/test/downstream/ensemble_multi_prob.jl
index 9f09a58b2c..5d2268feb7 100644
--- a/test/downstream/ensemble_multi_prob.jl
+++ b/test/downstream/ensemble_multi_prob.jl
@@ -4,11 +4,11 @@ using ModelingToolkit, OrdinaryDiffEq, Test
 D = Differential(t)
 
 @named sys1 = ODESystem([D(x) ~ x,
-    D(y) ~ -y])
+    D(y) ~ -y],t)
 @named sys2 = ODESystem([D(x) ~ 2x,
-    D(y) ~ -2y])
+    D(y) ~ -2y],t)
 @named sys3 = ODESystem([D(x) ~ 3x,
-    D(y) ~ -3y])
+    D(y) ~ -3y],t)
 
 prob1 = ODEProblem(sys1, [1.0, 1.0], (0.0, 1.0))
 prob2 = ODEProblem(sys2, [2.0, 2.0], (0.0, 1.0))