diff --git a/src/test/regress/expected/columnar_memory.out b/src/test/regress/expected/columnar_memory.out
index 117b8f900..250536e11 100644
--- a/src/test/regress/expected/columnar_memory.out
+++ b/src/test/regress/expected/columnar_memory.out
@@ -71,10 +71,10 @@ write_clear_outside_xact | t
 INSERT INTO t
  SELECT i, 'last batch', 0 /* no need to record memusage per row */
  FROM generate_series(1, 50000) i;
-SELECT 1.0 * TopMemoryContext / :top_post BETWEEN 0.98 AND 1.02 AS top_growth_ok
+SELECT CASE WHEN 1.0 * TopMemoryContext / :top_post BETWEEN 0.98 AND 1.02 THEN 1 ELSE 1.0 * TopMemoryContext / :top_post END AS top_growth
 FROM columnar_test_helpers.columnar_store_memory_stats();
--[ RECORD 1 ]-+--
-top_growth_ok | t
+-[ RECORD 1 ]-
+top_growth | 1
 
 -- before this change, max mem usage while executing inserts was 28MB and
 -- with this change it's less than 8MB.
diff --git a/src/test/regress/sql/columnar_memory.sql b/src/test/regress/sql/columnar_memory.sql
index b5d251644..679bcd99a 100644
--- a/src/test/regress/sql/columnar_memory.sql
+++ b/src/test/regress/sql/columnar_memory.sql
@@ -73,7 +73,7 @@ INSERT INTO t
  SELECT i, 'last batch', 0 /* no need to record memusage per row */
  FROM generate_series(1, 50000) i;
 
-SELECT 1.0 * TopMemoryContext / :top_post BETWEEN 0.98 AND 1.02 AS top_growth_ok
+SELECT CASE WHEN 1.0 * TopMemoryContext / :top_post BETWEEN 0.98 AND 1.02 THEN 1 ELSE 1.0 * TopMemoryContext / :top_post END AS top_growth
 FROM columnar_test_helpers.columnar_store_memory_stats();
 
 -- before this change, max mem usage while executing inserts was 28MB and