diff --git a/source/core/ut_utils.pkb b/source/core/ut_utils.pkb
index 438d32c60..4964848e7 100644
--- a/source/core/ut_utils.pkb
+++ b/source/core/ut_utils.pkb
@@ -437,17 +437,16 @@ procedure append_to_clob(a_src_clob in out nocopy clob, a_clob_table t_clob_tab,
   procedure save_dbms_output_to_cache is
     l_status number;
     l_line   varchar2(32767);
-    l_line_no integer := 1;
+    l_offset integer := 0;
     l_lines  ut_varchar2_rows := ut_varchar2_rows();
     c_lines_limit constant integer := 100;
     pragma autonomous_transaction;
 
-    procedure flush_lines is
+    procedure flush_lines(a_lines ut_varchar2_rows, a_offset integer) is
     begin
       insert into ut_dbms_output_cache (seq_no,text)
-        select rownum, column_value
-        from table(l_lines);
-      l_lines.delete;
+        select rownum+a_offset, column_value
+        from table(a_lines);
     end;
   begin
     loop
@@ -455,10 +454,12 @@ procedure append_to_clob(a_src_clob in out nocopy clob, a_clob_table t_clob_tab,
       exit when l_status = 1;
       l_lines := l_lines multiset union all ut_utils.convert_collection(ut_utils.clob_to_table(l_line||chr(7),4000));
       if l_lines.count > c_lines_limit then
-        flush_lines();
+        flush_lines(l_lines, l_offset);
+        l_offset := l_offset + l_lines.count;
+        l_lines.delete;
       end if;
     end loop;
-    flush_lines();
+    flush_lines(l_lines, l_offset);
     commit;
   end;
 
diff --git a/test/api/test_ut_runner.pkb b/test/api/test_ut_runner.pkb
index e957d3719..fa3121bfa 100644
--- a/test/api/test_ut_runner.pkb
+++ b/test/api/test_ut_runner.pkb
@@ -180,25 +180,35 @@ end;';
   procedure run_keep_dbms_output_buffer is
     l_expected         dbmsoutput_linesarray;
     l_actual           dbmsoutput_linesarray;
-    l_lines            number := 100;
+    l_results          ut3.ut_varchar2_list;
+    l_lines            number := 10000;
   begin
     --Arrange
     create_test_spec();
     create_test_body(0);
+
     l_expected := dbmsoutput_linesarray(
         'A text placed into DBMS_OUTPUT',
         'Another line',
         lpad('A very long line',10000,'a')
     );
-    dbms_output.put_line(l_expected(1));
-    dbms_output.put_line(l_expected(2));
-    dbms_output.put_line(l_expected(3));
+    for i in 1 .. 300 loop
+      l_expected.extend;
+      l_expected(l_expected.last) := 'line '||i;
+    end loop;
+
+    for i in 1 .. l_expected.count loop
+      dbms_output.put_line(l_expected(i));
+    end loop;
+
     --Act
-    ut3.ut.run('test_cache');
+    select *
+      bulk collect into l_results
+      from table(ut3.ut.run('test_cache'));
 
     --Assert
     dbms_output.get_lines(lines => l_actual, numlines => l_lines);
-    for i in 1 .. l_expected.count loop
+    for i in 1 .. l_lines loop
       ut.expect(l_actual(i)).to_equal(l_expected(i));
     end loop;
     drop_test_package();