diff --git a/src/org/labkey/test/tests/AbstractKnitrReportTest.java b/src/org/labkey/test/tests/AbstractKnitrReportTest.java
index 5236ed6dce..518707fd5f 100644
--- a/src/org/labkey/test/tests/AbstractKnitrReportTest.java
+++ b/src/org/labkey/test/tests/AbstractKnitrReportTest.java
@@ -175,7 +175,7 @@ protected void htmlFormat()
                                             Locator.tag("img").withAttribute("alt", "plot of chunk blood-pressure-scatter")), // new
                                     Locator.tag("pre").containing("## \"1\",249318596,\"2008-05-17\",86,36,129,76,64"),
                                     Locator.tag("pre").withText("## knitr says hello to HTML!"),
-                                    Locator.tag("pre").startsWith("## Error").containing(": non-numeric argument to binary operator"),
+                                    Locator.tag("pre").startsWith("## Error").containing("non-numeric argument to binary operator"),
                                     Locator.tag("p").startsWith("Well, everything seems to be working. Let's ask R what is the value of \u03C0? Of course it is 3.141"),
                                     nonceCheckSuccessLoc // Inline script should run
         };