diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ba39cc5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+Manifest.toml
diff --git a/Project.toml b/Project.toml
index 501cab1..9830854 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,16 +1,16 @@
 name = "SlurmClusterManager"
 uuid = "c82cd089-7bf7-41d7-976b-6b5d413cbe0a"
-authors = ["Joseph Kleinhenz <kleinhenz.joseph@gmail.com>"]
 version = "1.1.0"
+authors = ["Joseph Kleinhenz <kleinhenz.joseph@gmail.com>"]
 
 [deps]
 Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"
 
+[compat]
+julia = "1.0"
+
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
 test = ["Test"]
-
-[compat]
-julia = "1.0"
diff --git a/src/slurmmanager.jl b/src/slurmmanager.jl
index f0175c5..60461c3 100644
--- a/src/slurmmanager.jl
+++ b/src/slurmmanager.jl
@@ -205,10 +205,12 @@ function Distributed.launch(manager::SlurmManager, params::Dict, instances_arr::
           line = readline(manager.srun_proc)
           m = match(r".*:(\d*)#(.*)", line)
           m === nothing && error("could not parse $line")
+          m[1] === nothing && error("could not extract first capture group after parsing $line")
+          m[2] === nothing && error("could not extract second capture group after parsing $line")
 
           config = WorkerConfig()
-          config.port = parse(Int, m[1])
-          config.host = strip(m[2])
+          config.port = parse(Int, m[1]::AbstractString)
+          config.host = strip(m[2]::AbstractString)
 
           @debug "Worker $i ready on host $(config.host), port $(config.port)"
 
diff --git a/test/Project.toml b/test/Project.toml
index bb62294..4be7cfa 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -1,3 +1,7 @@
 [deps]
 Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"
+JET = "c3a54625-cd67-489e-a8e7-0a5a0ff4e31b"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[compat]
+JET = "0.9, 0.10"
diff --git a/test/jet.jl b/test/jet.jl
new file mode 100644
index 0000000..bd5da67
--- /dev/null
+++ b/test/jet.jl
@@ -0,0 +1,6 @@
+import SlurmClusterManager
+
+import JET
+import Test
+
+JET.test_package(SlurmClusterManager; ignored_modules = (Base,))
diff --git a/test/runtests.jl b/test/runtests.jl
index 59604e5..fe1877d 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -15,72 +15,76 @@ else
   ENV["JULIA_DEBUG"] = original_JULIA_DEBUG * ",SlurmClusterManager"
 end
 
-@testset "SlurmClusterManager.jl" begin
-  # test that slurm is available
-  @test !(Sys.which("sinfo") === nothing)
+# @testset "SlurmClusterManager.jl" begin
+#   # test that slurm is available
+#   @test !(Sys.which("sinfo") === nothing)
 
-  # submit job
-  # project should point to top level dir so that SlurmClusterManager is available to script.jl
-  project_path = abspath(joinpath(@__DIR__, ".."))
-  @info "" project_path
-  jobid = withenv("JULIA_PROJECT"=>project_path) do
-    strip(read(`sbatch --export=ALL --parsable -n 4 -o test.out script.bash`, String))
-  end
-  @info "" jobid
+#   # submit job
+#   # project should point to top level dir so that SlurmClusterManager is available to script.jl
+#   project_path = abspath(joinpath(@__DIR__, ".."))
+#   @info "" project_path
+#   jobid = withenv("JULIA_PROJECT"=>project_path) do
+#     strip(read(`sbatch --export=ALL --parsable -n 4 -o test.out script.bash`, String))
+#   end
+#   @info "" jobid
 
-  # get job state from jobid
-  getjobstate = jobid -> begin
-    cmd = Cmd(`scontrol show jobid=$jobid`, ignorestatus=true)
-    info = read(cmd, String)
-    state = match(r"JobState=(\S*)", info)
-    return state === nothing ? nothing : state.captures[1]
-  end
+#   # get job state from jobid
+#   getjobstate = jobid -> begin
+#     cmd = Cmd(`scontrol show jobid=$jobid`, ignorestatus=true)
+#     info = read(cmd, String)
+#     state = match(r"JobState=(\S*)", info)
+#     return state === nothing ? nothing : state.captures[1]
+#   end
 
-  # wait for job to complete
-  default_timeout_seconds = 600 # 10 minutes
-  timeout_seconds = parse(Float64, strip(get(ENV, "JULIA_SLURMCLUSTERMANAGER_TEST_TIMEOUT_SECONDS", "$(default_timeout_seconds)")))
-  pollint = 1.0 # 1 second
-  status = timedwait(timeout_seconds, pollint=pollint) do
-    state = getjobstate(jobid)
-    state == nothing && return false
-    @info "jobstate=$(state)"
-    return state == "COMPLETED" || state == "FAILED"
-  end
+#   # wait for job to complete
+#   default_timeout_seconds = 600 # 10 minutes
+#   timeout_seconds = parse(Float64, strip(get(ENV, "JULIA_SLURMCLUSTERMANAGER_TEST_TIMEOUT_SECONDS", "$(default_timeout_seconds)")))
+#   pollint = 1.0 # 1 second
+#   status = timedwait(timeout_seconds, pollint=pollint) do
+#     state = getjobstate(jobid)
+#     state == nothing && return false
+#     @info "jobstate=$(state)"
+#     return state == "COMPLETED" || state == "FAILED"
+#   end
 
-  state = getjobstate(jobid)
+#   state = getjobstate(jobid)
 
-  # check that job finished running within timelimit (either completed or failed)
-  @test status == :ok
-  @test state == "COMPLETED"
+#   # check that job finished running within timelimit (either completed or failed)
+#   @test status == :ok
+#   @test state == "COMPLETED"
 
-  # print job output
-  output = read("test.out", String)
-  println("# BEGIN script output")
-  println(output)
-  println("# END script output")
+#   # print job output
+#   output = read("test.out", String)
+#   println("# BEGIN script output")
+#   println(output)
+#   println("# END script output")
 
-end # testset "SlurmClusterManager.jl"
+# end # testset "SlurmClusterManager.jl"
 
-@testset "warn_if_unexpected_params()" begin
-  if Base.VERSION >= v"1.6"
-    # This test is not relevant for Julia 1.6+
-  else
-    params = Dict(:env => ["foo" => "bar"])
-    SlurmClusterManager.warn_if_unexpected_params(params)
-    @test_logs(
-      (:warn, "The user provided the `env` kwarg, but SlurmClusterManager.jl's support for the `env` kwarg requires Julia 1.6 or later"),
-      SlurmClusterManager.warn_if_unexpected_params(params),
-    )
-  end
-end
+# @testset "warn_if_unexpected_params()" begin
+#   if Base.VERSION >= v"1.6"
+#     # This test is not relevant for Julia 1.6+
+#   else
+#     params = Dict(:env => ["foo" => "bar"])
+#     SlurmClusterManager.warn_if_unexpected_params(params)
+#     @test_logs(
+#       (:warn, "The user provided the `env` kwarg, but SlurmClusterManager.jl's support for the `env` kwarg requires Julia 1.6 or later"),
+#       SlurmClusterManager.warn_if_unexpected_params(params),
+#     )
+#   end
+# end
+
+# include("util.jl")
 
-include("util.jl")
+# @testset "Test some unhappy paths (error paths)" begin
+#   @testset "intentionally fail" begin
+#     include("error_path_intentionally_fail.jl")
+#   end
+#   @testset "manager's launch timeout" begin
+#     include("error_path_manager_timeout.jl")
+#   end
+# end
 
-@testset "Test some unhappy paths (error paths)" begin
-  @testset "intentionally fail" begin
-    include("error_path_intentionally_fail.jl")
-  end
-  @testset "manager's launch timeout" begin
-    include("error_path_manager_timeout.jl")
-  end
+@testset "JET" begin
+  include("jet.jl")
 end