Update runtests.jl

Author: DilumAluthge

test/runtests.jl

@@ -19,6 +19,10 @@ end
   @testset "Unit tests" begin
     include("unit.jl")
   end
+
+  @testset "Test some unhappy paths (error paths)" begin
+    include("error_path_intentionally_fail.jl")
+  end
 
   # test that slurm is available
   @test !(Sys.which("sinfo") === nothing)