diff --git a/test/rx/transaction.test.js b/test/rx/transaction.test.js
index 199421df1..6e33321b0 100644
--- a/test/rx/transaction.test.js
+++ b/test/rx/transaction.test.js
@@ -693,7 +693,7 @@ describe('#integration-rx transaction', () => {
       .toPromise()
     expect(result).toEqual([
       Notification.createError(
-        jasmine.stringMatching(/Unexpected end of input/)
+        jasmine.stringMatching(/Unexpected end of input|Invalid input/)
       )
     ])
   }
diff --git a/test/session.test.js b/test/session.test.js
index 6e4713099..1fb197828 100644
--- a/test/session.test.js
+++ b/test/session.test.js
@@ -387,13 +387,14 @@ describe('#integration session', () => {
               'Query failed after a long running query was terminated',
               error
             )
+            done.fail.bind(done)
           })
       })
 
     // wait some time than close the session with a long running query
     setTimeout(() => {
       session.close().catch(done.fail.bind(done))
-    }, 1000)
+    }, 200)
   }, 70000)
 
   /* flaky
diff --git a/testkit/Dockerfile b/testkit/Dockerfile
index a791f7b41..438336155 100644
--- a/testkit/Dockerfile
+++ b/testkit/Dockerfile
@@ -1,19 +1,31 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
+
+ENV DEBIAN_FRONTEND noninteractive
 
 RUN apt-get update && \
     apt-get install -y \
         git \
         curl \
         python3 \
-        firefox \
         nodejs \
-        npm \
+        npm \ 
+        firefox \
     && rm -rf /var/lib/apt/lists/*
 
 RUN npm install -g npm \
     && /bin/bash -c 'hash -d npm'
 RUN npm install -g gulp
 
+# Enable tls v1.0
+RUN echo "openssl_conf = openssl_configuration\n"|cat - /etc/ssl/openssl.cnf > /tmp/openssl_conf.cnf \  
+    && mv /tmp/openssl_conf.cnf /etc/ssl/openssl.cnf  
+RUN echo "[openssl_configuration]\n\
+ssl_conf = ssl_configuration\n\
+[ssl_configuration]\n\
+system_default = tls_system_default\n\
+[tls_system_default]\n\
+CipherString = DEFAULT:@SECLEVEL=1" >> /etc/ssl/openssl.cnf 
+
 # Install our own CAs on the image.
 # Assumes Linux Debian based image.
 COPY CAs/* /usr/local/share/ca-certificates/
diff --git a/testkit/stress.py b/testkit/stress.py
index 530b9d619..d61305fed 100644
--- a/testkit/stress.py
+++ b/testkit/stress.py
@@ -11,4 +11,4 @@ def run(args):
     os.environ['STRESS_TEST_MODE'] = 'fastest'
     os.environ['RUNNING_TIME_IN_SECONDS'] = \
         os.environ.get('TEST_NEO4J_STRESS_DURATION', 0)
-    run(["npm", "run", "run-stress-tests"])
+    run(["gulp", "run-stress-tests-without-jasmine"])