diff --git a/src/org/labkey/test/tests/KnitrReportTest.java b/src/org/labkey/test/tests/KnitrReportTest.java
index 80708e982d..63ec9bbbae 100644
--- a/src/org/labkey/test/tests/KnitrReportTest.java
+++ b/src/org/labkey/test/tests/KnitrReportTest.java
@@ -199,10 +199,11 @@ private void verifyAdhocReportDependencies(String viewName, String dependencies)
 
         createKnitrReport(rmdDependenciesReport, RReportHelper.ReportOption.knitrMarkdown);
 
+        int errorCountBefore = getServerErrorCount();
         _rReportHelper.clickReportTab();
         waitForElement(Locator.id("mtcars_table"));
         assertElementNotPresent(Locator.id("mtcars_table_wrapper")); // Created by jQuery
-        checkExpectedErrors(1); // JavaScript error: "$(...).dataTable is not a function"
+        checkExpectedErrors(errorCountBefore + 1); // JavaScript error: "$(...).dataTable is not a function"
 
         // now set the dependencies
         _rReportHelper.clickSourceTab();