diff --git a/pom.xml b/pom.xml
index f947142a..ad22eefc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -531,7 +531,7 @@
             <version>2.22.1</version>
             <configuration>
                 <!-- see: https://stackoverflow.com/questions/53010200/maven-surefire-could-not-find-forkedbooter-class -->
-                <argLine>-Xmx1024m -Xms1024m -XX:MaxPermSize=512m -Djdk.net.URLClassPath.disableClassPathURLCheck=true</argLine>
+                <argLine>-Xmx1024m -Xms1024m -Djdk.net.URLClassPath.disableClassPathURLCheck=true</argLine>
             </configuration>
           </plugin>
           <plugin>
diff --git a/smoke-test/src/main/java/org/opennms/alec/smoke/util/ssh/SshClient.java b/smoke-test/src/main/java/org/opennms/alec/smoke/util/ssh/SshClient.java
index ced2b854..b5656441 100644
--- a/smoke-test/src/main/java/org/opennms/alec/smoke/util/ssh/SshClient.java
+++ b/smoke-test/src/main/java/org/opennms/alec/smoke/util/ssh/SshClient.java
@@ -40,7 +40,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.jcraft.jsch.Channel;
+import com.jcraft.jsch.ChannelShell;
 import com.jcraft.jsch.JSch;
 import com.jcraft.jsch.Session;
 
@@ -62,7 +62,7 @@ public class SshClient implements AutoCloseable {
 
     private final JSch jsch = new JSch();
     private Session session;
-    private Channel channel;
+    private ChannelShell channel;
     private InputStream stdout;
     private InputStream stderr;
 
@@ -92,7 +92,9 @@ public PrintStream openShell() throws Exception {
         session.setConfig(config);
         session.connect();
 
-        channel = session.openChannel("shell");
+        channel = (ChannelShell) session.openChannel("shell");
+        channel.setPty(true);
+        channel.setPtyType("xterm", 200, 40, 1024, 768); // width=200 columns, height=40 rows, optional pixel size
         stdout = channel.getInputStream();
         stderr = channel.getExtInputStream();
         channel.connect(timeout);
diff --git a/smoke-test/src/main/resources/docker_fixed_images b/smoke-test/src/main/resources/docker_fixed_images
index 3783ba67..11032858 100644
--- a/smoke-test/src/main/resources/docker_fixed_images
+++ b/smoke-test/src/main/resources/docker_fixed_images
@@ -8,5 +8,5 @@ kafka=confluentinc/cp-kafka:7.0.0
 postgres=postgres:10.7-alpine
 # Note this tag version should match the selenium version in the POM
 selenium=selenium/standalone-chrome-debug:3.4.0
-sentinel=opennms/sentinel:30.0.0
-opennms=opennms/horizon:30.0.0
+sentinel=opennms/sentinel:33.1.6
+opennms=opennms/horizon:33.1.6