diff --git a/src/test/regress/expected/float8-exp-three-digits-win32.out b/src/test/regress/expected/float8-exp-three-digits-win32.out
index fe97af0029..2dd648d6b9 100644
--- a/src/test/regress/expected/float8-exp-three-digits-win32.out
+++ b/src/test/regress/expected/float8-exp-three-digits-win32.out
@@ -24,25 +24,6 @@ SELECT '-10e-400'::float8;
 ERROR:  "-10e-400" is out of range for type double precision
 LINE 1: SELECT '-10e-400'::float8;
                ^
--- test whether denormalized values are accepted
-SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT '4.95e-324'::float8 > '0'::float8;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT substr('-4.95e-324'::float8::text, 1, 4);
- substr 
---------
- -4.9
-(1 row)
-
 -- bad input
 INSERT INTO FLOAT8_TBL(f1) VALUES ('');
 ERROR:  invalid input syntax for type double precision: ""
diff --git a/src/test/regress/expected/float8-small-is-zero.out b/src/test/regress/expected/float8-small-is-zero.out
index 2bf2e6ce60..5da743374c 100644
--- a/src/test/regress/expected/float8-small-is-zero.out
+++ b/src/test/regress/expected/float8-small-is-zero.out
@@ -24,25 +24,6 @@ SELECT '10e-400'::float8;
 
 SELECT '-10e-400'::float8;
  float8 
--- test whether denormalized values are accepted
-SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT '4.95e-324'::float8 > '0'::float8;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT substr('-4.95e-324'::float8::text, 1, 4);
- substr 
---------
- -4.9
-(1 row)
-
 --------
      -0
 (1 row)
diff --git a/src/test/regress/expected/float8-small-is-zero_1.out b/src/test/regress/expected/float8-small-is-zero_1.out
index b276eeca4f..530842e102 100644
--- a/src/test/regress/expected/float8-small-is-zero_1.out
+++ b/src/test/regress/expected/float8-small-is-zero_1.out
@@ -24,25 +24,6 @@ SELECT '10e-400'::float8;
 
 SELECT '-10e-400'::float8;
  float8 
--- test whether denormalized values are accepted
-SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT '4.95e-324'::float8 > '0'::float8;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT substr('-4.95e-324'::float8::text, 1, 4);
- substr 
---------
- -4.9
-(1 row)
-
 --------
       0
 (1 row)
diff --git a/src/test/regress/expected/float8.out b/src/test/regress/expected/float8.out
index df6ec9c58c..6221538af5 100644
--- a/src/test/regress/expected/float8.out
+++ b/src/test/regress/expected/float8.out
@@ -24,25 +24,6 @@ SELECT '-10e-400'::float8;
 ERROR:  "-10e-400" is out of range for type double precision
 LINE 1: SELECT '-10e-400'::float8;
                ^
--- test whether denormalized values are accepted
-SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT '4.95e-324'::float8 > '0'::float8;
- ?column? 
-----------
- t
-(1 row)
-
-SELECT substr('-4.95e-324'::float8::text, 1, 4);
- substr 
---------
- -4.9
-(1 row)
-
 -- bad input
 INSERT INTO FLOAT8_TBL(f1) VALUES ('');
 ERROR:  invalid input syntax for type double precision: ""
diff --git a/src/test/regress/sql/float8.sql b/src/test/regress/sql/float8.sql
index 1f24556fed..92a574ab7b 100644
--- a/src/test/regress/sql/float8.sql
+++ b/src/test/regress/sql/float8.sql
@@ -16,11 +16,6 @@ SELECT '-10e400'::float8;
 SELECT '10e-400'::float8;
 SELECT '-10e-400'::float8;
 
--- test whether denormalized values are accepted
-SELECT '4.95e-324'::float8 < '1.49e-323'::float8;
-SELECT '4.95e-324'::float8 > '0'::float8;
-SELECT substr('-4.95e-324'::float8::text, 1, 4);
-
 -- bad input
 INSERT INTO FLOAT8_TBL(f1) VALUES ('');
 INSERT INTO FLOAT8_TBL(f1) VALUES ('     ');