diff --git a/lib/kubetruth/template.rb b/lib/kubetruth/template.rb
index 51d66e8..a5f73ae 100644
--- a/lib/kubetruth/template.rb
+++ b/lib/kubetruth/template.rb
@@ -103,9 +103,11 @@ def stringify(str)
         str.to_s.to_json
       end
 
-      def to_yaml(str, no_header=false)
+      def to_yaml(str, options = {})
+        options = {} unless options.is_a?(Hash)
+        p options
         result = str.to_yaml
-        result = result[4..-1] if no_header
+        result = result[4..-1] if options['no_header']
         result
       end
 
diff --git a/spec/kubetruth/template_spec.rb b/spec/kubetruth/template_spec.rb
index 8d87cbe..4892426 100644
--- a/spec/kubetruth/template_spec.rb
+++ b/spec/kubetruth/template_spec.rb
@@ -128,11 +128,17 @@ module Kubetruth
 
         it "produces a yaml string" do
           expect(to_yaml([1, 2])).to eq("---\n- 1\n- 2\n")
+          # also check how liquid handles named parameters
+          expect(described_class.new("{{ var | to_yaml }}").render(var: [1, 2])).to eq("---\n- 1\n- 2\n")
         end
 
         it "produces header free yaml" do
-          expect(to_yaml([1, 2], true)).to eq("- 1\n- 2\n")
-          expect(to_yaml({"foo" => "bar"}, true)).to eq("foo: bar\n")
+          expect(to_yaml([1, 2], "no_header" => false)).to eq("---\n- 1\n- 2\n")
+          expect(to_yaml([1, 2], "no_header" => true)).to eq("- 1\n- 2\n")
+          expect(to_yaml({"foo" => "bar"}, "no_header" => true)).to eq("foo: bar\n")
+          # also verify that liquid handles named parameters
+          expect(described_class.new("{{ var | to_yaml: no_header: true}}").render(var: [1, 2])).to eq("- 1\n- 2\n")
+          expect(described_class.new("{{ var | to_yaml: no_header: false}}").render(var: [1, 2])).to eq("---\n- 1\n- 2\n")
         end
 
       end