diff --git a/__tests__/integration/mirador/embedding.html b/__tests__/integration/mirador/embedding.html
index 8b00ffc077dbaa6c154455db385658f505aca5c7..aec213d3bff4c743e8a29af6250c2c52596ffa1c 100644
--- a/__tests__/integration/mirador/embedding.html
+++ b/__tests__/integration/mirador/embedding.html
@@ -12,11 +12,13 @@
      #instanceOne {
        width: 100%;
        height: 50%;
+       position: relative;
      }
      #instanceTwo {
        margin: 0 auto;
        width: 800px;
        height: 600px;
+       position: relative;
      }
      .mirador-app {
        border: 2px solid black;