Update test/preferences.jl

Author: ChrisRackauckas

test/preferences.jl

@@ -356,7 +356,7 @@ using Preferences
                 println("  ✅ Tiny override correctly chose GenericLU")
             else
                 # Test that it chooses the expected algorithm when preference system is active
-                @test chosen_alg.alg === expected_algorithm || isa(chosen_alg, LinearSolve.DefaultLinearSolver)
+                @test chosen_alg.alg === expected_algorithm
                 println("  ✅ Size $(test_size) chose: $(chosen_alg.alg) (expected: $(expected_algorithm))")
             end