diff --git a/src/test/regress/expected/inet.out b/src/test/regress/expected/inet.out
index be9427eb6b817..caf91a7adbc89 100644
--- a/src/test/regress/expected/inet.out
+++ b/src/test/regress/expected/inet.out
@@ -790,3 +790,91 @@ SELECT inet_merge(c, i) FROM INET_TBL WHERE inet_same_family(c, i);
  ::/24
 (17 rows)
 
+-- tests to specifically check some of the potentially sharp edges when it
+-- comes to SortSupport implementation
+SELECT i FROM (VALUES
+  ('0.0.0.0/0'::inet),
+  ('0.0.0.1/0'::inet),
+  ('0.0.0.0/1'::inet),
+  ('0.0.0.0/32'::inet),
+  ('0.0.0.1/1'::inet),
+  ('192.168.1.4/0'::inet),
+  ('192.168.1.5/0'::inet),
+  ('255.255.255.255/0'::inet),
+  ('255.255.255.255/1'::inet),
+  ('192.168.1.3/1'::inet),
+  ('192.168.1.1/5'::inet),
+  ('192.168.1.255/5'::inet),
+  ('192.168.1.1/6'::inet),
+  ('192.168.1.255/6'::inet),
+  ('192.168.1.1/23'::inet),
+  ('192.168.1.2/23'::inet),
+  ('192.168.1.3/23'::inet),
+  ('192.168.1.0/24'::inet),
+  ('192.168.1.0/25'::inet),
+  ('255.255.255.255/31'::inet),
+  ('255.255.255.254/32'::inet),
+  ('255.255.255.255/32'::inet),
+  ('0000:0000:0000:0000:0000:0000:0000:0000/0'::inet),
+  ('ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/0'::inet),
+  ('0000:0000:0000:0000:0000:0000:0000:0000/128'::inet),
+  ('127::1'::inet),
+  ('127::2'::inet),
+  ('8000:0000:0000:0000:0000:0000:0000:0000/1'::inet),
+  ('ffff:83e7:f118:57dc:6093:6d92:689d:58cf/70'::inet),
+  ('ffff:84b0:4775:536e:c3ed:7116:a6d6:34f0/44'::inet),
+  ('ffff:8566:f84:5867:47f1:7867:d2ba:8a1a/69'::inet),
+  ('ffff:8883:f028:7d2:4d68:d510:7d6b:ac43/73'::inet),
+  ('ffff:8ae8:7c14:65b3:196:8e4a:89ae:fb30/89'::inet),
+  ('ffff:8dd0:646:694c:7c16:7e35:6a26:171/104'::inet),
+  ('ffff:8eef:cbf:700:eda3:ae32:f4b4:318b/121'::inet),
+  ('ffff:90e7:e744:664:a93:8efe:1f25:7663/122'::inet),
+  ('ffff:9597:c69c:8b24:57a:8639:ec78:6026/111'::inet),
+  ('ffff:9e86:79ea:f16e:df31:8e4d:7783:532e/88'::inet),
+  ('ffff:a0c7:82d3:24de:f762:6e1f:316d:3fb2/23'::inet),
+  ('ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/128'::inet)
+) AS i ORDER BY i;
+                      i                       
+----------------------------------------------
+ (0.0.0.0/0)
+ (0.0.0.1/0)
+ (192.168.1.4/0)
+ (192.168.1.5/0)
+ (255.255.255.255/0)
+ (0.0.0.0/1)
+ (0.0.0.1/1)
+ (0.0.0.0)
+ (192.168.1.3/1)
+ (255.255.255.255/1)
+ (192.168.1.1/5)
+ (192.168.1.255/5)
+ (192.168.1.1/6)
+ (192.168.1.255/6)
+ (192.168.1.1/23)
+ (192.168.1.2/23)
+ (192.168.1.3/23)
+ (192.168.1.0/24)
+ (192.168.1.0/25)
+ (255.255.255.255/31)
+ (255.255.255.254)
+ (255.255.255.255)
+ (::/0)
+ (ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/0)
+ (::)
+ (127::1)
+ (127::2)
+ (8000::/1)
+ (ffff:83e7:f118:57dc:6093:6d92:689d:58cf/70)
+ (ffff:84b0:4775:536e:c3ed:7116:a6d6:34f0/44)
+ (ffff:8566:f84:5867:47f1:7867:d2ba:8a1a/69)
+ (ffff:8883:f028:7d2:4d68:d510:7d6b:ac43/73)
+ (ffff:8ae8:7c14:65b3:196:8e4a:89ae:fb30/89)
+ (ffff:8dd0:646:694c:7c16:7e35:6a26:171/104)
+ (ffff:8eef:cbf:700:eda3:ae32:f4b4:318b/121)
+ (ffff:90e7:e744:664:a93:8efe:1f25:7663/122)
+ (ffff:9597:c69c:8b24:57a:8639:ec78:6026/111)
+ (ffff:9e86:79ea:f16e:df31:8e4d:7783:532e/88)
+ (ffff:a0c7:82d3:24de:f762:6e1f:316d:3fb2/23)
+ (ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff)
+(40 rows)
+
diff --git a/src/test/regress/sql/inet.sql b/src/test/regress/sql/inet.sql
index 880e115360d98..3b49b5a046186 100644
--- a/src/test/regress/sql/inet.sql
+++ b/src/test/regress/sql/inet.sql
@@ -146,3 +146,48 @@ INSERT INTO INET_TBL (c, i) VALUES ('10', '10::/8');
 SELECT inet_merge(c, i) FROM INET_TBL;
 -- fix it by inet_same_family() condition
 SELECT inet_merge(c, i) FROM INET_TBL WHERE inet_same_family(c, i);
+
+-- tests to specifically check some of the potentially sharp edges when it
+-- comes to SortSupport implementation
+SELECT i FROM (VALUES
+  ('0.0.0.0/0'::inet),
+  ('0.0.0.1/0'::inet),
+  ('0.0.0.0/1'::inet),
+  ('0.0.0.0/32'::inet),
+  ('0.0.0.1/1'::inet),
+  ('192.168.1.4/0'::inet),
+  ('192.168.1.5/0'::inet),
+  ('255.255.255.255/0'::inet),
+  ('255.255.255.255/1'::inet),
+  ('192.168.1.3/1'::inet),
+  ('192.168.1.1/5'::inet),
+  ('192.168.1.255/5'::inet),
+  ('192.168.1.1/6'::inet),
+  ('192.168.1.255/6'::inet),
+  ('192.168.1.1/23'::inet),
+  ('192.168.1.2/23'::inet),
+  ('192.168.1.3/23'::inet),
+  ('192.168.1.0/24'::inet),
+  ('192.168.1.0/25'::inet),
+  ('255.255.255.255/31'::inet),
+  ('255.255.255.254/32'::inet),
+  ('255.255.255.255/32'::inet),
+  ('0000:0000:0000:0000:0000:0000:0000:0000/0'::inet),
+  ('ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/0'::inet),
+  ('0000:0000:0000:0000:0000:0000:0000:0000/128'::inet),
+  ('127::1'::inet),
+  ('127::2'::inet),
+  ('8000:0000:0000:0000:0000:0000:0000:0000/1'::inet),
+  ('ffff:83e7:f118:57dc:6093:6d92:689d:58cf/70'::inet),
+  ('ffff:84b0:4775:536e:c3ed:7116:a6d6:34f0/44'::inet),
+  ('ffff:8566:f84:5867:47f1:7867:d2ba:8a1a/69'::inet),
+  ('ffff:8883:f028:7d2:4d68:d510:7d6b:ac43/73'::inet),
+  ('ffff:8ae8:7c14:65b3:196:8e4a:89ae:fb30/89'::inet),
+  ('ffff:8dd0:646:694c:7c16:7e35:6a26:171/104'::inet),
+  ('ffff:8eef:cbf:700:eda3:ae32:f4b4:318b/121'::inet),
+  ('ffff:90e7:e744:664:a93:8efe:1f25:7663/122'::inet),
+  ('ffff:9597:c69c:8b24:57a:8639:ec78:6026/111'::inet),
+  ('ffff:9e86:79ea:f16e:df31:8e4d:7783:532e/88'::inet),
+  ('ffff:a0c7:82d3:24de:f762:6e1f:316d:3fb2/23'::inet),
+  ('ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff/128'::inet)
+) AS i ORDER BY i;