diff --git a/.ci/get_test_matrix.sh b/.ci/get_test_matrix.sh
index cb16191dba..5d903ef6d9 100755
--- a/.ci/get_test_matrix.sh
+++ b/.ci/get_test_matrix.sh
@@ -16,7 +16,7 @@ REPOS=$(./.ci/parse_yaml.py $YAML_FILE $ARCH)
 
 FIRST=true
 
-echo "["
+echo -n "["
 
 echo "$REPOS" | while IFS= read -r REPO; do
 
@@ -30,7 +30,12 @@ echo "$REPOS" | while IFS= read -r REPO; do
     continue
   fi
 
-  echo "$PACKAGE,"
+  if $FIRST; then
+    echo -n "$PACKAGE"
+    FIRST=false
+  else
+    echo -n ", $PACKAGE"
+  fi
 
 done