diff --git a/docs/gotcha.txt b/docs/gotcha.txt
index a80955280..4f4a1cd6d 100644
--- a/docs/gotcha.txt
+++ b/docs/gotcha.txt
@@ -17,6 +17,7 @@ save you many hours of grief.
      approval.  The old behavior often resulted in several users trying
      to approve version tags that had already been approved.
    
+   * WebGUI now requires Test::Harness 3.16 or higher.
 
 7.7.7
 --------------------------------------------------------------------
diff --git a/sbin/testEnvironment.pl b/sbin/testEnvironment.pl
index 8b3e90425..feae0f2fb 100755
--- a/sbin/testEnvironment.pl
+++ b/sbin/testEnvironment.pl
@@ -133,6 +133,7 @@ checkModule('Scope::Guard',                 '0.03'       );
 checkModule('Digest::SHA',                  '5.47'       );
 checkModule("CSS::Minifier::XS",            "0.03"       );
 checkModule("JavaScript::Minifier::XS",     "0.05"       );
+checkModule('Test::Harness',                '3.16'       );
 
 failAndExit("Required modules are missing, running no more checks.") if $missingModule;