diff --git a/js/tests/molecules-cells_test.js b/js/tests/molecules-cells_test.js
index 85090f2e8..cca507a9f 100644
--- a/js/tests/molecules-cells_test.js
+++ b/js/tests/molecules-cells_test.js
@@ -4,9 +4,11 @@ const t = (f) => tests.push(f)
 t(({ eq }) => eq(RNA(''), ''))
 t(({ eq }) => eq(RNA('TAGC'), 'AUCG'))
 t(({ eq }) => eq(RNA(DNA('AUCG')), 'AUCG'))
+t(({ eq }) => eq(RNA(DNA('CAUG')), 'CAUG'))
 
 t(({ eq }) => eq(DNA(''), ''))
 t(({ eq }) => eq(DNA('AUCG'), 'TAGC'))
 t(({ eq }) => eq(DNA(RNA('TAGC')), 'TAGC'))
+t(({ eq }) => eq(DNA(RNA('GCAT')), 'GCAT'))
 
 Object.freeze(tests)