diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 55be42c..6966fbd 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -25,12 +25,12 @@ jobs:
       fail-fast: false
       matrix:
         exasol_db_version: [
-          8.29.1,
+          8.26.0,
           7.1.29
         ]
         
     env: {
-      DEFAULT_EXASOL_DB_VERSION: 8.29.1
+      DEFAULT_EXASOL_DB_VERSION: 8.26.0
     }
     steps:
       - name: Free Disk Space
diff --git a/.project-keeper.yml b/.project-keeper.yml
index 00e297b..f1267fb 100644
--- a/.project-keeper.yml
+++ b/.project-keeper.yml
@@ -12,6 +12,6 @@ build:
   runnerOs: ubuntu-20.04
   freeDiskSpace: true
   exasolDbVersions:
-    - "8.29.1"
+    - "8.26.0" # "8.29.1"
     - "7.1.29"
 excludes:
diff --git a/src/test/resources/logback-test.xml b/src/test/resources/logback-test.xml
index c5bacdd..9f79d4d 100644
--- a/src/test/resources/logback-test.xml
+++ b/src/test/resources/logback-test.xml
@@ -16,6 +16,6 @@
     <appender-ref ref="STDOUT"/>
   </root>
 
-  <logger name="com.exasol" additivity="false" level="trace">
-  </logger>
+  <logger name="com.exasol" additivity="false" level="trace" />
+  <logger name="org.testcontainers" additivity="false" level="debug" />
 </configuration>