diff --git a/lib/rubocop/cop/minitest/multiple_assertions.rb b/lib/rubocop/cop/minitest/multiple_assertions.rb
index c0224abd..c75f2b6b 100644
--- a/lib/rubocop/cop/minitest/multiple_assertions.rb
+++ b/lib/rubocop/cop/minitest/multiple_assertions.rb
@@ -49,12 +49,6 @@ def on_class(class_node)
 
         private
 
-        def assertions_count(node)
-          node.each_descendant(:send).count do |send_node|
-            assertion_method?(send_node)
-          end
-        end
-
         def max_assertions
           Integer(cop_config.fetch('Max', 3))
         end
diff --git a/lib/rubocop/cop/minitest/no_assertions.rb b/lib/rubocop/cop/minitest/no_assertions.rb
index b63d719b..b0eea3f7 100644
--- a/lib/rubocop/cop/minitest/no_assertions.rb
+++ b/lib/rubocop/cop/minitest/no_assertions.rb
@@ -35,13 +35,6 @@ def on_class(class_node)
             add_offense(node.block_type? ? node.loc.expression : node.loc.name)
           end
         end
-
-        private
-
-        def assertions_count(node)
-          base = assertion_method?(node) ? 1 : 0
-          base + node.each_child_node.sum { |c| assertions_count(c) }
-        end
       end
     end
   end
diff --git a/lib/rubocop/cop/mixin/minitest_exploration_helpers.rb b/lib/rubocop/cop/mixin/minitest_exploration_helpers.rb
index 0ec865ad..d0a640b0 100644
--- a/lib/rubocop/cop/mixin/minitest_exploration_helpers.rb
+++ b/lib/rubocop/cop/mixin/minitest_exploration_helpers.rb
@@ -86,6 +86,12 @@ def assertions(def_node)
         send_nodes.select { |send_node| assertion_method?(send_node) }
       end
 
+      def assertions_count(node)
+        node.each_descendant(:send).count do |send_node|
+          assertion_method?(send_node)
+        end
+      end
+
       def assertion_method?(node)
         return false if !node.send_type? && !node.block_type?