diff --git a/tsl/test/shared/expected/transparent_decompress_chunk-14.out b/tsl/test/shared/expected/transparent_decompress_chunk-14.out
index d48c2c2faba..b1e873f4682 100644
--- a/tsl/test/shared/expected/transparent_decompress_chunk-14.out
+++ b/tsl/test/shared/expected/transparent_decompress_chunk-14.out
@@ -780,6 +780,9 @@ QUERY PLAN
 
 -- test OUTER JOIN
 SET min_parallel_table_scan_size TO '0';
+-- Disable merge join to get stable tests. These queries uses hash
+-- joins.
+SET enable_mergejoin TO off;
 :PREFIX_NO_VERBOSE
 SELECT *
 FROM :TEST_TABLE m1
@@ -877,6 +880,7 @@ QUERY PLAN
                            ->  Seq Scan on compress_hyper_X_X_chunk compress_hyper_X_X_chunk_1
 (10 rows)
 
+RESET enable_mergejoin;
 RESET parallel_leader_participation;
 :PREFIX
 SELECT *
diff --git a/tsl/test/shared/expected/transparent_decompress_chunk-15.out b/tsl/test/shared/expected/transparent_decompress_chunk-15.out
index b7e9890210c..41a40745859 100644
--- a/tsl/test/shared/expected/transparent_decompress_chunk-15.out
+++ b/tsl/test/shared/expected/transparent_decompress_chunk-15.out
@@ -782,6 +782,9 @@ QUERY PLAN
 
 -- test OUTER JOIN
 SET min_parallel_table_scan_size TO '0';
+-- Disable merge join to get stable tests. These queries uses hash
+-- joins.
+SET enable_mergejoin TO off;
 :PREFIX_NO_VERBOSE
 SELECT *
 FROM :TEST_TABLE m1
@@ -879,6 +882,7 @@ QUERY PLAN
                            ->  Seq Scan on compress_hyper_X_X_chunk compress_hyper_X_X_chunk_1
 (10 rows)
 
+RESET enable_mergejoin;
 RESET parallel_leader_participation;
 :PREFIX
 SELECT *
diff --git a/tsl/test/shared/expected/transparent_decompress_chunk-16.out b/tsl/test/shared/expected/transparent_decompress_chunk-16.out
index 0f3bf7a552a..d2956dc0f19 100644
--- a/tsl/test/shared/expected/transparent_decompress_chunk-16.out
+++ b/tsl/test/shared/expected/transparent_decompress_chunk-16.out
@@ -782,6 +782,9 @@ QUERY PLAN
 
 -- test OUTER JOIN
 SET min_parallel_table_scan_size TO '0';
+-- Disable merge join to get stable tests. These queries uses hash
+-- joins.
+SET enable_mergejoin TO off;
 :PREFIX_NO_VERBOSE
 SELECT *
 FROM :TEST_TABLE m1
@@ -879,6 +882,7 @@ QUERY PLAN
                            ->  Seq Scan on compress_hyper_X_X_chunk compress_hyper_X_X_chunk_1
 (10 rows)
 
+RESET enable_mergejoin;
 RESET parallel_leader_participation;
 :PREFIX
 SELECT *
diff --git a/tsl/test/shared/expected/transparent_decompress_chunk-17.out b/tsl/test/shared/expected/transparent_decompress_chunk-17.out
index 0f3bf7a552a..d2956dc0f19 100644
--- a/tsl/test/shared/expected/transparent_decompress_chunk-17.out
+++ b/tsl/test/shared/expected/transparent_decompress_chunk-17.out
@@ -782,6 +782,9 @@ QUERY PLAN
 
 -- test OUTER JOIN
 SET min_parallel_table_scan_size TO '0';
+-- Disable merge join to get stable tests. These queries uses hash
+-- joins.
+SET enable_mergejoin TO off;
 :PREFIX_NO_VERBOSE
 SELECT *
 FROM :TEST_TABLE m1
@@ -879,6 +882,7 @@ QUERY PLAN
                            ->  Seq Scan on compress_hyper_X_X_chunk compress_hyper_X_X_chunk_1
 (10 rows)
 
+RESET enable_mergejoin;
 RESET parallel_leader_participation;
 :PREFIX
 SELECT *
diff --git a/tsl/test/shared/sql/transparent_decompress_chunk.sql.in b/tsl/test/shared/sql/transparent_decompress_chunk.sql.in
index d9a674a9404..45b5859d02c 100644
--- a/tsl/test/shared/sql/transparent_decompress_chunk.sql.in
+++ b/tsl/test/shared/sql/transparent_decompress_chunk.sql.in
@@ -241,6 +241,9 @@ FROM metrics m1
 
 -- test OUTER JOIN
 SET min_parallel_table_scan_size TO '0';
+-- Disable merge join to get stable tests. These queries uses hash
+-- joins.
+SET enable_mergejoin TO off;
 :PREFIX_NO_VERBOSE
 SELECT *
 FROM :TEST_TABLE m1
@@ -288,6 +291,7 @@ ORDER BY m1.time,
     m1.device_id,
     m2.device_id
 LIMIT 10;
+RESET enable_mergejoin;
 RESET parallel_leader_participation;
 
 :PREFIX