diff --git a/src/phase_spaces/access.jl b/src/phase_spaces/access.jl
index 7a936cf..cc51c66 100644
--- a/src/phase_spaces/access.jl
+++ b/src/phase_spaces/access.jl
@@ -25,3 +25,6 @@ end
 QEDbase.process(psp::PhaseSpacePoint) = psp.proc
 QEDbase.model(psp::PhaseSpacePoint) = psp.model
 QEDbase.phase_space_definition(psp::PhaseSpacePoint) = psp.ps_def
+
+QEDbase.particles(psp::PhaseSpacePoint, ::QEDbase.Incoming) = psp.in_particles
+QEDbase.particles(psp::PhaseSpacePoint, ::QEDbase.Outgoing) = psp.out_particles
diff --git a/src/phase_spaces/types.jl b/src/phase_spaces/types.jl
index 9897064..7f3fcb7 100644
--- a/src/phase_spaces/types.jl
+++ b/src/phase_spaces/types.jl
@@ -122,7 +122,7 @@ struct PhaseSpacePoint{
     IN_PARTICLES<:Tuple{Vararg{ParticleStateful}},
     OUT_PARTICLES<:Tuple{Vararg{ParticleStateful}},
     ELEMENT<:QEDbase.AbstractFourMomentum,
-} <: QEDbase.AbstractPhaseSpacePoint{PROC,MODEL,PSDEF,IN_PARTICLES,OUT_PARTICLES,ELEMENT}
+} <: QEDbase.AbstractPhaseSpacePoint{PROC,MODEL,PSDEF,IN_PARTICLES,OUT_PARTICLES}
     proc::PROC
     model::MODEL
     ps_def::PSDEF
diff --git a/test/interfaces/setup.jl b/test/interfaces/setup.jl
index 8facc99..067a8ed 100644
--- a/test/interfaces/setup.jl
+++ b/test/interfaces/setup.jl
@@ -155,8 +155,8 @@ struct TestProcess <: QEDbase.AbstractProcessDefinition end
 struct TestModel <: QEDbase.AbstractModelDefinition end
 
 struct TestProcessSetup <: QEDbase.AbstractProcessSetup end
-QEDbase.QEDbase.scattering_process(::TestProcessSetup) = TestProcess()
-QEDbase.QEDbase.physical_model(::TestProcessSetup) = TestModel()
+QEDbase.scattering_process(::TestProcessSetup) = TestProcess()
+QEDbase.physical_model(::TestProcessSetup) = TestModel()
 
 struct TestProcessSetupFAIL <: QEDbase.AbstractProcessSetup end
 
@@ -182,8 +182,8 @@ struct TestProcessSetupFAIL <: QEDbase.AbstractProcessSetup end
         INCOMING_PARTICLES = rand(RNG, PARTICLE_SET, N_INCOMING)
         OUTGOING_PARTICLES = rand(RNG, PARTICLE_SET, N_OUTGOING)
 
-        @suppress QEDbase.QEDbase.incoming_particles(::TestProcess) = INCOMING_PARTICLES
-        @suppress QEDbase.QEDbase.outgoing_particles(::TestProcess) = OUTGOING_PARTICLES
+        @suppress QEDbase.incoming_particles(::TestProcess) = INCOMING_PARTICLES
+        @suppress QEDbase.outgoing_particles(::TestProcess) = OUTGOING_PARTICLES
 
         @testset "delegated functions" begin
             stp = TestProcessSetup()
diff --git a/test/runtests.jl b/test/runtests.jl
index 5b7a4b1..02a159f 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -29,7 +29,7 @@ begin
         include("particles/types.jl")
     end
 
-    @time @safetestset "particle types" begin
+    @time @safetestset "particle states" begin
         include("particles/states.jl")
     end
 
diff --git a/test/test_implementation/test_process.jl b/test/test_implementation/test_process.jl
index 0de4ae3..67c844a 100644
--- a/test/test_implementation/test_process.jl
+++ b/test/test_implementation/test_process.jl
@@ -19,8 +19,8 @@ function TestProcess(rng::AbstractRNG, N_in::Int, N_out::Int)
     return TestProcess(in_particles, out_particles)
 end
 
-QEDbase.QEDbase.incoming_particles(proc::TestProcess) = proc.incoming_particles
-QEDbase.QEDbase.outgoing_particles(proc::TestProcess) = proc.outgoing_particles
+QEDbase.incoming_particles(proc::TestProcess) = proc.incoming_particles
+QEDbase.outgoing_particles(proc::TestProcess) = proc.outgoing_particles
 
 struct TestProcess_FAIL{IP<:Tuple,OP<:Tuple} <: QEDbase.AbstractProcessDefinition
     incoming_particles::IP
@@ -69,8 +69,8 @@ function TestProcess_FAIL_DIFFCS(rng::AbstractRNG, N_in::Int, N_out::Int)
     return TestProcess_FAIL_DIFFCS(in_particles, out_particles)
 end
 
-QEDbase.QEDbase.incoming_particles(proc::TestProcess_FAIL_DIFFCS) = proc.incoming_particles
-QEDbase.QEDbase.outgoing_particles(proc::TestProcess_FAIL_DIFFCS) = proc.outgoing_particles
+QEDbase.incoming_particles(proc::TestProcess_FAIL_DIFFCS) = proc.incoming_particles
+QEDbase.outgoing_particles(proc::TestProcess_FAIL_DIFFCS) = proc.outgoing_particles
 
 # dummy phase space definition + failing phase space definition
 struct TestPhasespaceDef <: QEDbase.AbstractPhasespaceDefinition end