diff --git a/src/test/regress/expected/float4-exp-three-digits.out b/src/test/regress/expected/float4-exp-three-digits.out
index ea6f77a671a..f17f95697a2 100644
--- a/src/test/regress/expected/float4-exp-three-digits.out
+++ b/src/test/regress/expected/float4-exp-three-digits.out
@@ -125,18 +125,6 @@ SELECT 'nan'::numeric::float4;
     NaN
 (1 row)
 
-SELECT 'nan'::float8::float4;
- float4 
---------
-    NaN
-(1 row)
-
-SELECT 'nan'::float4::float8;
- float8 
---------
-    NaN
-(1 row)
-
 SELECT '' AS five, * FROM FLOAT4_TBL;
  five |      f1      
 ------+--------------
diff --git a/src/test/regress/expected/float4.out b/src/test/regress/expected/float4.out
index ab9b1acd493..fd46a4a1db7 100644
--- a/src/test/regress/expected/float4.out
+++ b/src/test/regress/expected/float4.out
@@ -125,18 +125,6 @@ SELECT 'nan'::numeric::float4;
     NaN
 (1 row)
 
-SELECT 'nan'::float8::float4;
- float4 
---------
-    NaN
-(1 row)
-
-SELECT 'nan'::float4::float8;
- float8 
---------
-    NaN
-(1 row)
-
 SELECT '' AS five, * FROM FLOAT4_TBL;
  five |     f1      
 ------+-------------
diff --git a/src/test/regress/sql/float4.sql b/src/test/regress/sql/float4.sql
index e6f5c7425da..3b363f94635 100644
--- a/src/test/regress/sql/float4.sql
+++ b/src/test/regress/sql/float4.sql
@@ -41,8 +41,6 @@ SELECT 'Infinity'::float4 + 100.0;
 SELECT 'Infinity'::float4 / 'Infinity'::float4;
 SELECT 'nan'::float4 / 'nan'::float4;
 SELECT 'nan'::numeric::float4;
-SELECT 'nan'::float8::float4;
-SELECT 'nan'::float4::float8;
 
 SELECT '' AS five, * FROM FLOAT4_TBL;