diff --git a/lib/buildkite/test_collector/minitest_plugin/reporter.rb b/lib/buildkite/test_collector/minitest_plugin/reporter.rb
index 49463ad..e6ac263 100644
--- a/lib/buildkite/test_collector/minitest_plugin/reporter.rb
+++ b/lib/buildkite/test_collector/minitest_plugin/reporter.rb
@@ -11,8 +11,10 @@ def initialize(io, options)
     def record(result)
       super
 
-      if trace = Buildkite::TestCollector.uploader.traces[result.source_location]
-        Buildkite::TestCollector.session&.write_result(trace)
+      if Buildkite::TestCollector.uploader
+        if trace = Buildkite::TestCollector.uploader.traces[result.source_location]
+          Buildkite::TestCollector.session&.write_result(trace)
+        end
       end
     end