diff --git a/.rubocop.yml b/.rubocop.yml
index 0b53b1fb7e8db646bbe2c6129252d6a923869636..0b470abd7d329869ce538688266e031d9e17ea5f 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -122,10 +122,6 @@ Lint/OutOfRangeRegexpRef:
 Lint/MissingSuper:
   Enabled: false
 
-Lint/ConstantDefinitionInBlock:
-  AllowedMethods:
-    - when_ready
-
 Style/BlockDelimiters:
   EnforcedStyle: semantic
   AllowBracesOnProceduralOneLiners: true
diff --git a/bin/sim_job b/bin/sim_job
index 0a2cdc47c233549779ba06bbc3bee4ab91db562d..aa1d70076b90c9b35015fe3fabddafb64614678d 100755
--- a/bin/sim_job
+++ b/bin/sim_job
@@ -275,9 +275,10 @@ EM.run do
 	}.catch { |e|
 		LOG.error e
 
-		if e.is_a?(::Exception)
+		case e
+		when :Exception
 			Sentry.capture_exception(e)
-		elsif e.is_a?(EM::HttpClient)
+		when EM::HttpClient
 			LOG.error e.response_header
 			Sentry.capture_message(
 				"HTTP Error: #{e.response_header.http_status} @ #{e.last_effective_url}"