diff --git a/spec/consistency_spec.rb b/spec/consistency_spec.rb
index 9bb60a9..4e72d72 100644
--- a/spec/consistency_spec.rb
+++ b/spec/consistency_spec.rb
@@ -39,6 +39,29 @@
 
         specify { expect(subject.signature(array)).to eq md5 }
       end
+
+      context 'given stringified hash' do
+        let(:stringified_hash) {"{ a: { b: 'b', c: 'c' }, d: 'd' }"}
+        let(:md5) { 'f5327912eeb41996b5aded6550d11187' }
+
+        specify { expect(subject.signature(stringified_hash)).to eq md5 }
+      end
+
+      context 'given a string' do
+        let(:string) {"do shash'owania"}
+        let(:md5) { '48e380a165c417253512a904d6b5cf2b' }
+
+        specify { expect(subject.signature(string)).to eq md5 }
+      end
+
+      context 'given a number' do
+        let(:number) {1234567890}
+        # RUBY 2.5.0
+        # let(:md5) { 'cbabd6f8bfda13b76c0e28eb0a6f4ef1' }
+        let(:md5) { '1f5c62f597aefd84d180c26e1de61021' }
+
+        specify { expect(subject.signature(number)).to eq md5 }
+      end
     end
   end
 end
diff --git a/spec/crimp_spec.rb b/spec/crimp_spec.rb
index bb96378..8c80591 100644
--- a/spec/crimp_spec.rb
+++ b/spec/crimp_spec.rb
@@ -3,6 +3,7 @@
 describe Crimp do
   let (:hash) { { a: { b: 'b', c: 'c' }, d: 'd' } }
   let (:hash_unordered) { { d: 'd', a: { c: 'c', b: 'b' } } }
+  let (:stringified_hash) {"{ a: { b: 'b', c: 'c' }, d: 'd' }"}
   let (:array) { [1, 2, 3, [4, [5, 6]]] }
   let (:array_unordered) { [3, 2, 1, [[5, 6], 4]] }
 
@@ -24,6 +25,15 @@
       end
     end
 
+    context 'given a stringified hash' do
+      specify { expect(subject.signature(stringified_hash)).to be_a String }
+
+      it 'returns MD5 hash of stringified hash' do
+        # puts subject.signature(stringified_hash)
+        expect(subject.signature(stringified_hash)).to eq(Digest::MD5.hexdigest(subject.stringify(stringified_hash)))
+      end
+    end
+
     context 'given an Array' do
       specify { expect(subject.signature(array)).to be_a String }