Eval the initialization code separately.

If we put it in a block of expressions, it can't define things
that need to happen at top level (e.g. macros).

Author: maleadt

src/ParallelTestRunner.jl

@@ -146,10 +146,10 @@ function runtest(::Type{TestRecord}, f, name, init_code)
             wait(@spawnat 1 print_testworker_started(name, id))
         end
 
+        Core.eval(mod, init_code)
         data = @eval mod begin
             GC.gc(true)
             Random.seed!(1)
-            $init_code
 
             res = @timed @testset $name begin
                 $f

test/init.jl

@@ -1 +1,2 @@
 @test should_be_defined()
+@test @should_also_be_defined()

test/runtests.jl

@@ -5,13 +5,18 @@ pushfirst!(ARGS, "--verbose")
 init_code = quote
     using Test
     should_be_defined() = true
+
+    macro should_also_be_defined()
+        return :(true)
+    end
 end
 
 runtests(ARGS; init_code)
 
 custom_tests = Dict(
     "custom" => quote
         @test should_be_defined()
+        @test @should_also_be_defined()
     end
 )
 runtests(ARGS; init_code, custom_tests)