diff --git a/core/api/src/test/java/org/onosproject/ui/AbstractUiTest.java b/core/api/src/test/java/org/onosproject/ui/AbstractUiTest.java
index 077d132..9242863 100644
--- a/core/api/src/test/java/org/onosproject/ui/AbstractUiTest.java
+++ b/core/api/src/test/java/org/onosproject/ui/AbstractUiTest.java
@@ -27,6 +27,11 @@
     protected static final String EOL = String.format("%n");
 
     /**
+     * Tolerance for Double equality assertions.
+     */
+    protected static final double TOLERANCE = Double.MIN_VALUE * 2;
+
+    /**
      * Prints the given string to stdout.
      *
      * @param s string to print