diff --git a/.travis.yml b/.travis.yml
index 041e1a6..919f3c7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,70 +1,34 @@
-sudo: required
-
-group: edge
-
+sudo: true
 dist: trusty
-
-services:
- - docker
-
-before_install:
- - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
- - sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
- - sudo apt-get update
- - sudo apt-get -y -o Dpkg::Options::="--force-confnew" install docker-ce
-
-install:
- - wget https://s3.amazonaws.com/rebar3/rebar3 && chmod +x rebar3
- - wget http://ftp.de.debian.org/debian/pool/main/l/lcov/lcov_1.11.orig.tar.gz
- - tar xf lcov_1.11.orig.tar.gz
- - sudo make -C lcov-1.11/ install
- - gem install coveralls-lcov
-
-env:
- - DOCKER_MACHINE_STATUS="Running" DOCKER_MACHINE_IP="0.0.0.0"
-
 language: erlang
 otp_release:
   - 20.2
-
+  - 20.3
+env:
+  - ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe ORACLE_SID=XE
+before_install:
+  - eval sudo chmod +x "$(dirname `which erl`)/../erts-*/bin/epmd"
+  - eval "$(dirname `which erl`)/../erts-*/bin/epmd" -daemon
+  - export PATH=$PATH:$ORACLE_HOME/bin/
+  - wget https://raw.githubusercontent.com/Vincit/travis-oracledb-xe/master/accept_the_license_agreement_for_oracledb_xe_11g_and_install.sh
+  - bash ./accept_the_license_agreement_for_oracledb_xe_11g_and_install.sh
+  - export LD_LIBRARY_PATH=$ORACLE_HOME/lib/${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
+install:
+  - wget https://s3.amazonaws.com/rebar3/rebar3
+  - chmod +x rebar3
+  - wget http://ftp.de.debian.org/debian/pool/main/l/lcov/lcov_1.11.orig.tar.gz
+  - tar xf lcov_1.11.orig.tar.gz
+  - sudo make -C lcov-1.11/ install
+  - gem install coveralls-lcov
 before_script:
- - docker version
- - docker info
- - kerl list installations
- - lcov --directory . --zerocounters
-
+  - kerl list installations
+  - lcov --directory . --zerocounters
 script:
- - docker pull konnexionsgmbh/db_11_2_xe
- - docker images
- - docker create --shm-size 1G --name oranif_db -p 1521:1521/tcp -e ORACLE_PWD=oracle konnexionsgmbh/db_11_2_xe
- - docker start oranif_db
- - wget -q -P /tmp https://github.com/K2InformaticsGmbH/oranif/wiki/travis/oracle-instantclient19.3-basic_19.3.0.0.0-2_amd64.deb
- - wget -q -P /tmp https://github.com/K2InformaticsGmbH/oranif/wiki/travis/oracle-instantclient19.3-sqlplus_19.3.0.0.0-2_amd64.deb
- - sudo apt install /tmp/oracle-instantclient19.3-basic_19.3.0.0.0-2_amd64.deb
- - sudo apt install /tmp/oracle-instantclient19.3-sqlplus_19.3.0.0.0-2_amd64.deb
- - export LD_LIBRARY_PATH=/usr/lib/oracle/19.3/client64/lib/${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
- - echo $LD_LIBRARY_PATH
- - ERL_INTERFACE_DIR="$(ls -d ~/otp/$TRAVIS_OTP_RELEASE/lib/erl_interface*/)"
- - OTP_ERTS_DIR="$(ls -d ~/otp/$TRAVIS_OTP_RELEASE/erts*/)"
- - export ERL_INTERFACE_DIR="${ERL_INTERFACE_DIR:0:$((${#ERL_INTERFACE_DIR} - 1))}"
- - export OTP_ERTS_DIR="${OTP_ERTS_DIR:0:$((${#OTP_ERTS_DIR} - 1))}"
- - ./rebar3 version
- - LINKODPI=true ./rebar3 as test compile
- - export LD_LIBRARY_PATH=./priv/${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
- - export LD_LIBRARY_PATH=./c_src/odpi/lib/${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
- - while [ "`docker inspect -f {{.State.Health.Status}} oranif_db`" != "healthy" ]; do docker ps -a; sleep 60; done
- - sudo ldconfig
- - sleep 60
- - docker ps -a
- - cd test/
- - echo exit | sqlplus sys/oracle@$DOCKER_MACHINE_IP:1521/XE as sysdba @travis $(pwd)/log/
- - cd -
- - sudo chmod +x $OTP_ERTS_DIR/bin/epmd
- - $OTP_ERTS_DIR/bin/epmd &
- - LINKODPI=true ./rebar3 eunit
-
+  - echo exit | sqlplus sys/travis@127.0.0.1:1521/XE as sysdba @test/travis.sql $(pwd)/log/
+  - export LD_LIBRARY_PATH=./priv/${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
+  - ./rebar3 eunit
 after_success:
- - lcov --directory . --capture --output-file coverage.info # capture coverage info
- - lcov -r coverage.info "*.h" -o coverage_stripped.info # header files are not covered
- - lcov --list coverage_stripped.info # log coverage result
- - coveralls-lcov coverage_stripped.info # uploads to coveralls
+  - lcov --directory . --capture --output-file coverage.info # capture coverage info
+  - lcov -r coverage.info "c_src/odpi/src/*.c" "*.h" -o coverage.info # header files are not covered
+  - lcov --list coverage.info --list-full-path # log coverage result
+  - coveralls-lcov coverage.info # uploads to coveralls
diff --git a/README.md b/README.md
index 5abbe7a..85f3713 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,17 @@ Oracle Call Interface driver using dirty NIFs. Requires Erlang/OTP 20 or later w
 ## Development
 Currently builds in Window, Linux and OS X
 
+#### Create Environment variables (Windows Only)
+```
+OTP_ERTS_DIR       = path to erlang run time system
+```
+Example `.bashrc` snippet:
+```sh
+...
+export OTP_ERTS_DIR=$(find /usr/lib/erlang/ -maxdepth 1 -type d -name erts-*)
+...
+```
+
 ## Compile (all OSs)
 
 ```sh
@@ -51,19 +62,6 @@ lcov --directory . --capture --output-file coverage.info
 lcov --list coverage.info
 ```
 
-#### Create Environment variables
-```
-OTP_ERTS_DIR       = path to erlang run time system
-ERL_INTERFACE_DIR  = path to erl_interface or erlang installation
-```
-Example `.bashrc` snippet:
-```sh
-...
-export OTP_ERTS_DIR=$(find /usr/lib/erlang/ -maxdepth 1 -type d -name erts-*)
-export ERL_INTERFACE_DIR=$(find /usr/lib/erlang/lib/ -maxdepth 1 -type d -name erl_interface-*)
-...
-```
-
 ## Testing
 There are some eunit tests which can be executed through `rebar3 do clean, compile, eunit` (Oracle Server connect info **MUST** be supplied through `tests/connect.config` first).
 
@@ -73,8 +71,8 @@ C:\> sqlplus system
 ```
 ```sql
 EXEC DBMS_XDB.SETLISTENERLOCALACCESS(FALSE);
+alter session set "_ORACLE_SCRIPT"=true; -- mandatory >= Oracle 12c 
 create user scott identified by tiger;
-alter session set "_ORACLE_SCRIPT"=true; -- if 'create user scott...' results into ORA-65096
 
 grant alter system to scott;
 grant create session to scott;
diff --git a/c_src/Makefile b/c_src/Makefile
index 0d94422..60369f8 100644
--- a/c_src/Makefile
+++ b/c_src/Makefile
@@ -1,10 +1,7 @@
 O = priv
 S = c_src
 ODPI_REPO = https://github.com/K2InformaticsGmbH/odpi
-
-ifndef OTP_ERTS_DIR
-$(error OTP_ERTS_DIR is not set)
-endif
+ERTS_DIR ?= $(shell erl -noshell -s init stop -eval "io:format(\"~ts/erts-~ts/\", [code:root_dir(), erlang:system_info(version)]).")
 
 SRCS = $(wildcard $(S)/*.c)
 ODPIROOT = $(S)/odpi
@@ -12,7 +9,7 @@ ODPI_LIB_DIR = $(S)/odpi/lib
 
 TARGET = $(O)/dpi_nif.so
 
-INCLUDEDIRS = -I$(S) -I"$(OTP_ERTS_DIR)/include" -I"$(S)/odpi/include"
+INCLUDEDIRS = -I$(S) -I"$(ERTS_DIR)/include" -I"$(S)/odpi/include"
 CFLAGS = $(INCLUDEDIRS) -O2 -ggdb -Wall -fPIC -std=c11
 LDFLAGS = -shared
 
diff --git a/test/travis.sql b/test/travis.sql
index 388e54f..66fd66d 100644
--- a/test/travis.sql
+++ b/test/travis.sql
@@ -16,7 +16,7 @@ SET VERIFY OFF
 DEFINE logfile_dir = &1
 
 host mkdir &&logfile_dir
-CONNECT system/oracle@0.0.0.0:1521/xe
+CONNECT system/travis@0.0.0.0:1521/xe
 SET SHOWMODE OFF
 
 DEFINE spool_file = &&logfile_dir.hr_main.log