diff --git a/moment_kinetics/src/external_sources.jl b/moment_kinetics/src/external_sources.jl
index 8b6886666..00ea31958 100644
--- a/moment_kinetics/src/external_sources.jl
+++ b/moment_kinetics/src/external_sources.jl
@@ -397,7 +397,7 @@ function setup_external_sources!(input_dict, r, z, electron_physics; ignore_MPI=
                      source_strength=ion_settings.source_strength,
                      source_T=ion_settings.source_T,
                     )
-        if ion_settings.source_type != "energy" && ion_settings.source_type != "temperature_midpoint_control"
+        if ion_settings.source_type ∉("energy", "temperature_midpoint_control")
             # Need to keep same amplitude for ions and electrons so there is no charge
             # source.
             if input["source_strength"] != ion_settings.source_strength
diff --git a/moment_kinetics/test/multi_source_tests.jl b/moment_kinetics/test/multi_source_tests.jl
index bf773be25..f79d7ba08 100644
--- a/moment_kinetics/test/multi_source_tests.jl
+++ b/moment_kinetics/test/multi_source_tests.jl
@@ -262,32 +262,3 @@ end
 using .Multi_Source_Tests
 
 Multi_Source_Tests.runtests()
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