diff --git a/presto-main/src/main/java/com/facebook/presto/type/VarcharOperators.java b/presto-main/src/main/java/com/facebook/presto/type/VarcharOperators.java
index 7ec09681a6ec1..10217d48a741e 100644
--- a/presto-main/src/main/java/com/facebook/presto/type/VarcharOperators.java
+++ b/presto-main/src/main/java/com/facebook/presto/type/VarcharOperators.java
@@ -148,7 +148,7 @@ public static double castToDouble(@SqlType("varchar(x)") Slice slice)
             return Double.parseDouble(slice.toStringUtf8());
         }
         catch (Exception e) {
-            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Can not cast '%s' to DOUBLE", slice.toStringUtf8()));
+            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to DOUBLE", slice.toStringUtf8()));
         }
     }
 
@@ -161,7 +161,7 @@ public static long castToFloat(@SqlType("varchar(x)") Slice slice)
             return Float.floatToIntBits(Float.parseFloat(slice.toStringUtf8()));
         }
         catch (Exception e) {
-            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Can not cast '%s' to REAL", slice.toStringUtf8()));
+            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to REAL", slice.toStringUtf8()));
         }
     }
 
@@ -174,7 +174,7 @@ public static long castToBigint(@SqlType("varchar(x)") Slice slice)
             return Long.parseLong(slice.toStringUtf8());
         }
         catch (Exception e) {
-            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Can not cast '%s' to BIGINT", slice.toStringUtf8()));
+            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to BIGINT", slice.toStringUtf8()));
         }
     }
 
@@ -187,7 +187,7 @@ public static long castToInteger(@SqlType("varchar(x)") Slice slice)
             return Integer.parseInt(slice.toStringUtf8());
         }
         catch (Exception e) {
-            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Can not cast '%s' to INT", slice.toStringUtf8()));
+            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to INT", slice.toStringUtf8()));
         }
     }
 
@@ -200,7 +200,7 @@ public static long castToSmallint(@SqlType("varchar(x)") Slice slice)
             return Short.parseShort(slice.toStringUtf8());
         }
         catch (Exception e) {
-            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Can not cast '%s' to SMALLINT", slice.toStringUtf8()));
+            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to SMALLINT", slice.toStringUtf8()));
         }
     }
 
@@ -213,7 +213,7 @@ public static long castToTinyint(@SqlType("varchar(x)") Slice slice)
             return Byte.parseByte(slice.toStringUtf8());
         }
         catch (Exception e) {
-            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Can not cast '%s' to TINYINT", slice.toStringUtf8()));
+            throw new PrestoException(INVALID_CAST_ARGUMENT, format("Cannot cast '%s' to TINYINT", slice.toStringUtf8()));
         }
     }
 
diff --git a/presto-main/src/test/java/com/facebook/presto/type/TestArrayOperators.java b/presto-main/src/test/java/com/facebook/presto/type/TestArrayOperators.java
index 42d364bad440f..8b4b61e2ad70e 100644
--- a/presto-main/src/test/java/com/facebook/presto/type/TestArrayOperators.java
+++ b/presto-main/src/test/java/com/facebook/presto/type/TestArrayOperators.java
@@ -290,7 +290,7 @@ public void testJsonToArray()
         assertInvalidCast("CAST(unchecked_to_json('[1] 2') AS ARRAY<BIGINT>)", "Cannot cast to array(bigint). Unexpected trailing token: 2\n[1] 2");
         assertInvalidCast("CAST(unchecked_to_json('[1, 2, 3') AS ARRAY<BIGINT>)", "Cannot cast to array(bigint).\n[1, 2, 3");
 
-        assertInvalidCast("CAST(JSON '[\"a\", \"b\"]' AS ARRAY<BIGINT>)", "Cannot cast to array(bigint). Can not cast 'a' to BIGINT\n[\"a\",\"b\"]");
+        assertInvalidCast("CAST(JSON '[\"a\", \"b\"]' AS ARRAY<BIGINT>)", "Cannot cast to array(bigint). Cannot cast 'a' to BIGINT\n[\"a\",\"b\"]");
         assertInvalidCast("CAST(JSON '[1234567890123.456]' AS ARRAY<INTEGER>)", "Cannot cast to array(integer). Out of range for integer: 1.234567890123456E12\n[1.234567890123456E12]");
     }
 
diff --git a/presto-main/src/test/java/com/facebook/presto/type/TestMapOperators.java b/presto-main/src/test/java/com/facebook/presto/type/TestMapOperators.java
index c7f40895db93a..955bd2d6027dd 100644
--- a/presto-main/src/test/java/com/facebook/presto/type/TestMapOperators.java
+++ b/presto-main/src/test/java/com/facebook/presto/type/TestMapOperators.java
@@ -455,7 +455,7 @@ public void testJsonToMap()
         assertInvalidCast("CAST(unchecked_to_json('{\"a\": 1} 2') AS MAP<VARCHAR, BIGINT>)", "Cannot cast to map(varchar,bigint). Unexpected trailing token: 2\n{\"a\": 1} 2");
         assertInvalidCast("CAST(unchecked_to_json('{\"a\": 1') AS MAP<VARCHAR, BIGINT>)", "Cannot cast to map(varchar,bigint).\n{\"a\": 1");
 
-        assertInvalidCast("CAST(JSON '{\"a\": \"b\"}' AS MAP<VARCHAR, BIGINT>)", "Cannot cast to map(varchar,bigint). Can not cast 'b' to BIGINT\n{\"a\":\"b\"}");
+        assertInvalidCast("CAST(JSON '{\"a\": \"b\"}' AS MAP<VARCHAR, BIGINT>)", "Cannot cast to map(varchar,bigint). Cannot cast 'b' to BIGINT\n{\"a\":\"b\"}");
         assertInvalidCast("CAST(JSON '{\"a\": 1234567890123.456}' AS MAP<VARCHAR, INTEGER>)", "Cannot cast to map(varchar,integer). Out of range for integer: 1.234567890123456E12\n{\"a\":1.234567890123456E12}");
 
         assertInvalidCast("CAST(JSON '{\"1\":1, \"01\": 2}' AS MAP<BIGINT, BIGINT>)", "Cannot cast to map(bigint,bigint). Duplicate keys are not allowed\n{\"01\":2,\"1\":1}");