diff --git a/logstash-core/lib/logstash/config/source/multi_local.rb b/logstash-core/lib/logstash/config/source/multi_local.rb
index 2a523e85031..14697835cba 100644
--- a/logstash-core/lib/logstash/config/source/multi_local.rb
+++ b/logstash-core/lib/logstash/config/source/multi_local.rb
@@ -30,7 +30,7 @@ def initialize(settings)
     end
 
     def pipeline_configs
-      pipelines = retrieve_yaml_pipelines
+      pipelines = deep_replace(retrieve_yaml_pipelines)
       pipelines_settings = pipelines.map do |pipeline_settings|
         clone = @original_settings.clone
         clone.merge_pipeline_settings(pipeline_settings)
diff --git a/logstash-core/spec/logstash/config/source/multi_local_spec.rb b/logstash-core/spec/logstash/config/source/multi_local_spec.rb
index 2d7747da5ce..a8e9b4a3791 100644
--- a/logstash-core/spec/logstash/config/source/multi_local_spec.rb
+++ b/logstash-core/spec/logstash/config/source/multi_local_spec.rb
@@ -146,16 +146,17 @@
 
   describe "#pipeline_configs" do
 
-    let(:config_string) {
-     "input {
-        udp {
-          port => 5555 # intentional comment contains \"${UDP_DEV_PORT}\" variable, shouldn't break functionalities
-          host => \"127.0.0.1\"
-        }
-        # another intentional comment contains \"${UDP_PROD_HOST}\" variable, shouldn't break functionalities
-      }
-      output {}"
-    }
+#     let(:config_string) {
+#      "input {
+#         udp {
+#           port => 5555 # intentional comment contains \"${UDP_DEV_PORT}\" variable, shouldn't break functionalities
+#           host => \"127.0.0.1\"
+#         }
+#         # another intentional comment contains \"${UDP_PROD_HOST}\" variable, shouldn't break functionalities
+#       }
+#       output {}"
+#     }
+    let(:config_string) { "input {} output {}" }
     let(:retrieved_pipelines) do
       [
         { "pipeline.id" => "main", "config.string" => config_string },