diff --git a/src/test/regress/expected/numerology.out b/src/test/regress/expected/numerology.out
index 44d6c435ded..2ffc73e8548 100644
--- a/src/test/regress/expected/numerology.out
+++ b/src/test/regress/expected/numerology.out
@@ -2,6 +2,68 @@
 -- NUMEROLOGY
 -- Test various combinations of numeric types and functions.
 --
+--
+-- Trailing junk in numeric literals
+--
+SELECT 123abc;
+ abc 
+-----
+ 123
+(1 row)
+
+SELECT 0x0o;
+ x0o 
+-----
+   0
+(1 row)
+
+SELECT 1_2_3;
+ _2_3 
+------
+    1
+(1 row)
+
+SELECT 0.a;
+ a 
+---
+ 0
+(1 row)
+
+SELECT 0.0a;
+  a  
+-----
+ 0.0
+(1 row)
+
+SELECT .0a;
+  a  
+-----
+ 0.0
+(1 row)
+
+SELECT 0.0e1a;
+ a 
+---
+ 0
+(1 row)
+
+SELECT 0.0e;
+  e  
+-----
+ 0.0
+(1 row)
+
+SELECT 0.0e+a;
+ERROR:  syntax error at or near "+"
+LINE 1: SELECT 0.0e+a;
+                   ^
+PREPARE p1 AS SELECT $1a;
+EXECUTE p1(1);
+ a 
+---
+ 1
+(1 row)
+
 --
 -- Test implicit type conversions
 -- This fails for Postgres v6.1 (and earlier?)
diff --git a/src/test/regress/sql/numerology.sql b/src/test/regress/sql/numerology.sql
index fddb58f8fdb..fb75f97832d 100644
--- a/src/test/regress/sql/numerology.sql
+++ b/src/test/regress/sql/numerology.sql
@@ -3,6 +3,22 @@
 -- Test various combinations of numeric types and functions.
 --
 
+--
+-- Trailing junk in numeric literals
+--
+
+SELECT 123abc;
+SELECT 0x0o;
+SELECT 1_2_3;
+SELECT 0.a;
+SELECT 0.0a;
+SELECT .0a;
+SELECT 0.0e1a;
+SELECT 0.0e;
+SELECT 0.0e+a;
+PREPARE p1 AS SELECT $1a;
+EXECUTE p1(1);
+
 --
 -- Test implicit type conversions
 -- This fails for Postgres v6.1 (and earlier?)