diff --git a/sbin/testEnvironment.pl b/sbin/testEnvironment.pl
index a7f54f7b8..7a3bec936 100755
--- a/sbin/testEnvironment.pl
+++ b/sbin/testEnvironment.pl
@@ -123,6 +123,8 @@ checkModule("Module::Find",                 "0.06"       );
 checkModule("Class::C3",                    "0.19"       );
 checkModule("Params::Validate",             "0.81"       );
 checkModule("Clone",                        "0.31"       );
+checkModule("CSS::Minifier::XS",            "0.03"       );
+checkModule("JavaScript::Minifier::XS",     "0.05"       );
 
 failAndExit("Required modules are missing, running no more checks.") if $missingModule;