diff --git a/src/device/opencl/memory.jl b/src/device/opencl/memory.jl
index 085f021f..cc6fe57d 100644
--- a/src/device/opencl/memory.jl
+++ b/src/device/opencl/memory.jl
@@ -39,7 +39,7 @@ end
         alignment!(gv, Base.datatype_alignment(T))
 
         # generate IR
-        Builder(ctx) do builder
+        IRBuilder(ctx) do builder
             entry = BasicBlock(llvm_f, "entry"; ctx)
             position!(builder, entry)
 
diff --git a/src/device/opencl/printf.jl b/src/device/opencl/printf.jl
index 505efa1c..da461a7d 100644
--- a/src/device/opencl/printf.jl
+++ b/src/device/opencl/printf.jl
@@ -39,7 +39,7 @@ end
         mod = LLVM.parent(llvm_f)
 
         # generate IR
-        Builder(ctx) do builder
+        IRBuilder(ctx) do builder
             entry = BasicBlock(llvm_f, "entry"; ctx)
             position!(builder, entry)
 
@@ -49,7 +49,7 @@ end
             printf_typ = LLVM.FunctionType(T_int32, [T_pint8]; vararg=true)
             printf = LLVM.Function(mod, "printf", printf_typ)
             push!(function_attributes(printf), EnumAttribute("nobuiltin"; ctx))
-            chars = call!(builder, printf, [str, parameters(llvm_f)...])
+            chars = call!(builder, printf_typ, printf, [str, parameters(llvm_f)...])
 
             ret!(builder, chars)
         end
diff --git a/test/runtests.jl b/test/runtests.jl
index fb610c0f..d70d5934 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -42,12 +42,12 @@ if do_help
                --help             Show this text.
                --list             List all available tests.
                --quickfail        Fail the entire run as soon as a single test errored.
-               --jobs=N           Launch `N` processes to perform tests (default: Threads.nthreads()).
+               --jobs=N           Launch `N` processes to perform tests (default: Sys.CPU_THREADS).
 
                Remaining arguments filter the tests that will be executed.""")
     exit(0)
 end
-_, jobs = extract_flag!(ARGS, "--jobs", Threads.nthreads())
+_, jobs = extract_flag!(ARGS, "--jobs", Sys.CPU_THREADS)
 do_quickfail, _ = extract_flag!(ARGS, "--quickfail")
 
 include("setup.jl")     # make sure everything is precompiled
@@ -55,6 +55,8 @@ include("setup.jl")     # make sure everything is precompiled
 
 @info "Using oneAPI support library at " * oneAPI.Support.liboneapi_support
 
+@info "Running $jobs tests in parallel. If this is too many, specify the `--jobs` argument to the tests, or set the JULIA_CPU_THREADS environment variable."
+
 # choose tests
 const tests = []
 const test_runners = Dict()