diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
index 05fb7c2..900e234 100644
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,4 +1,6 @@
 #### Unreleased
+* Don't use a shared closure for each spawned thread
+  > awilfox: https://github.com/okcomputer-ruby/okcomputer/pull/27
 * Add SolidQueue checks: `SolidQueueCheck` (liveness + job stats),
   `SolidQueueBackedUpCheck` (per-queue backlog), `SolidQueueFailedJobsCheck`
   (total failed jobs), `SolidQueueFailedJobsRateCheck` (rapid increase in
diff --git a/lib/ok_computer/check_collection.rb b/lib/ok_computer/check_collection.rb
index 21d403f..4073733 100644
--- a/lib/ok_computer/check_collection.rb
+++ b/lib/ok_computer/check_collection.rb
@@ -113,10 +113,7 @@ def check_in_sequence
     end
 
     def check_in_parallel
-      threads = checks.map do |check|
-        Thread.new { check.run }
-      end
-      threads.each(&:join)
+      checks.map{ |check| Thread.new(check, &:run) }.each(&:join)
     end
   end
 end