diff --git a/theodolite-benchmarks/docker-test/uc1-beam-flink/test.sh b/theodolite-benchmarks/docker-test/uc1-beam-flink/test.sh
index 9662fde3dbac4c3540a7ca898086a5603a53d482..721ad29de71cc226edf754b0f6990812e9ed4155 100755
--- a/theodolite-benchmarks/docker-test/uc1-beam-flink/test.sh
+++ b/theodolite-benchmarks/docker-test/uc1-beam-flink/test.sh
@@ -2,7 +2,7 @@
 
 docker-compose logs --tail 100 benchmark-taskmanager |
     sed -n "s/^.*Key:\s\(\S*\), Value:\s\(\S*\).*$/\2/p" |
-    tee /dev/tty |
+    tee /dev/stderr |
     jq .identifier |
     sort |
     uniq |
diff --git a/theodolite-benchmarks/docker-test/uc1-beam-samza/test.sh b/theodolite-benchmarks/docker-test/uc1-beam-samza/test.sh
index 1fdbe9ff938b83335a43ec6862d28e833d2594b2..dc71ed7fc455999b358f2c65c7e5eb4122965f00 100755
--- a/theodolite-benchmarks/docker-test/uc1-beam-samza/test.sh
+++ b/theodolite-benchmarks/docker-test/uc1-beam-samza/test.sh
@@ -2,7 +2,7 @@
 
 docker-compose logs --tail 100 benchmark |
     sed -n "s/^.*Key:\s\(\S*\), Value:\s\(\S*\).*$/\2/p" |
-    tee /dev/tty |
+    tee /dev/stderr |
     jq .identifier |
     sort |
     uniq |
diff --git a/theodolite-benchmarks/docker-test/uc1-flink/test.sh b/theodolite-benchmarks/docker-test/uc1-flink/test.sh
index 39952ba3943683e94fb2ab0e8965daf440635c29..7b993e6f9c6c3fc4aab133a60925c2a28d37212d 100755
--- a/theodolite-benchmarks/docker-test/uc1-flink/test.sh
+++ b/theodolite-benchmarks/docker-test/uc1-flink/test.sh
@@ -2,7 +2,7 @@
 
 docker-compose logs --tail 100 benchmark-taskmanager |
     sed -n "s/^.*Record:\s\(\S*\)$/\1/p" |
-    tee /dev/tty |
+    tee /dev/stderr |
     jq .identifier |
     sort |
     uniq |
diff --git a/theodolite-benchmarks/docker-test/uc1-kstreams/test.sh b/theodolite-benchmarks/docker-test/uc1-kstreams/test.sh
index c26a28988e3603d08b70fd325a736180b4a04dbb..f63d7551777fc8f5b1a24e7490142c7fd88d4175 100755
--- a/theodolite-benchmarks/docker-test/uc1-kstreams/test.sh
+++ b/theodolite-benchmarks/docker-test/uc1-kstreams/test.sh
@@ -2,7 +2,7 @@
 
 docker-compose logs --tail 100 benchmark |
     sed -n "s/^.*Record:\s\(\S*\)$/\1/p" |
-    tee /dev/tty |
+    tee /dev/stderr |
     jq .identifier |
     sort |
     uniq |