--- testssl.sh	2018-09-26 13:03:32.784246841 +0200
+++ testssl.sh	2018-09-26 13:04:13.654496336 +0200
@@ -192,7 +192,7 @@

 ########### Tuning vars which cannot be set by a cmd line switch. Use instead e.g "HEADER_MAXSLEEP=10 ./testssl.sh <your_args_here>"
 #
-TESTSSL_INSTALL_DIR="${TESTSSL_INSTALL_DIR:-""}"  # If you run testssl.sh and it doesn't find it necessary file automagically set TESTSSL_INSTALL_DIR
+TESTSSL_INSTALL_DIR="${TESTSSL_INSTALL_DIR:-"/usr/share/testssl.sh"}"  # If you run testssl.sh and it doesn't find it necessary file automagically set TESTSSL_INSTALL_DIR
 CA_BUNDLES_PATH="${CA_BUNDLES_PATH:-""}"          # You can have your CA stores some place else
 EXPERIMENTAL=${EXPERIMENTAL:-false}     # a development hook which allows us to disable code
 PROXY_WAIT=${PROXY_WAIT:-20}            # waiting at max 20 seconds for socket reply through proxy