diff --git a/temporalio/.yardopts b/temporalio/.yardopts
index 93196d0c..b14d0a3a 100644
--- a/temporalio/.yardopts
+++ b/temporalio/.yardopts
@@ -1,2 +1,3 @@
 --readme README.md
 --protected
+--exclude sig/
diff --git a/temporalio/lib/temporalio/internal/bridge.rb b/temporalio/lib/temporalio/internal/bridge.rb
index b4fe5063..e2c70621 100644
--- a/temporalio/lib/temporalio/internal/bridge.rb
+++ b/temporalio/lib/temporalio/internal/bridge.rb
@@ -25,11 +25,11 @@ def self.assert_fiber_compatibility!
               'see https://github.com/temporalio/sdk-ruby/issues/162'
       end
 
-      def self.fibers_supported # rubocop:disable Naming/PredicateMethod
+      def self.fibers_supported
         # We do not allow fibers on < 3.3 due to a bug we still need to dig
         # into: https://github.com/temporalio/sdk-ruby/issues/162
         major, minor = RUBY_VERSION.split('.').take(2).map(&:to_i)
-        !major.nil? && major >= 3 && !minor.nil? && minor >= 3
+        !major.nil? && !minor.nil? && (major > 3 || (major == 3 && minor >= 3))
       end
     end
   end
diff --git a/temporalio/test/worker_activity_test.rb b/temporalio/test/worker_activity_test.rb
index 9f2a3a68..e0ccaaa5 100644
--- a/temporalio/test/worker_activity_test.rb
+++ b/temporalio/test/worker_activity_test.rb
@@ -41,6 +41,21 @@ def test_block
     assert_equal 'Greetings, Block!', execute_activity(activity, 'Block')
   end
 
+  class SimpleFiberActivity < Temporalio::Activity::Definition
+    activity_executor :fiber
+
+    def execute(name)
+      "Hello, #{name}!"
+    end
+  end
+
+  # Unconditionally assert fiber executor works for all supported Ruby versions support fibers
+  def test_simple_fiber_activity
+    Async do
+      assert_equal 'Hello, Fiber!', execute_activity(SimpleFiberActivity, 'Fiber')
+    end
+  end
+
   class FiberActivity < Temporalio::Activity::Definition
     attr_reader :waiting_notification, :result_notification