diff --git a/presto-postgresql/src/test/java/io/prestosql/plugin/postgresql/TestPostgreSqlTypeMapping.java b/presto-postgresql/src/test/java/io/prestosql/plugin/postgresql/TestPostgreSqlTypeMapping.java
index 564dd2b863e3b..0618a94d6484e 100644
--- a/presto-postgresql/src/test/java/io/prestosql/plugin/postgresql/TestPostgreSqlTypeMapping.java
+++ b/presto-postgresql/src/test/java/io/prestosql/plugin/postgresql/TestPostgreSqlTypeMapping.java
@@ -34,7 +34,6 @@
 import java.time.ZoneId;
 import java.util.function.Function;
 
-import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkState;
 import static com.google.common.base.Verify.verify;
 import static com.google.common.io.BaseEncoding.base16;
@@ -48,11 +47,11 @@
 import static io.prestosql.tests.datatype.DataType.decimalDataType;
 import static io.prestosql.tests.datatype.DataType.doubleDataType;
 import static io.prestosql.tests.datatype.DataType.integerDataType;
+import static io.prestosql.tests.datatype.DataType.jsonDataType;
 import static io.prestosql.tests.datatype.DataType.realDataType;
 import static io.prestosql.tests.datatype.DataType.smallintDataType;
 import static io.prestosql.tests.datatype.DataType.varbinaryDataType;
 import static io.prestosql.tests.datatype.DataType.varcharDataType;
-import static io.prestosql.type.JsonType.JSON;
 import static java.lang.String.format;
 import static java.nio.charset.StandardCharsets.UTF_16LE;
 import static java.nio.charset.StandardCharsets.UTF_8;
@@ -352,18 +351,6 @@ private static DataType<byte[]> byteaDataType()
                 identity());
     }
 
-    private static DataType<String> jsonDataType()
-    {
-        return dataType(
-                "json",
-                JSON,
-                value -> {
-                    checkArgument(!value.contains("'"));
-                    return format("JSON '%s'", value);
-                },
-                identity());
-    }
-
     private DataSetup prestoCreateAsSelect(String tableNamePrefix)
     {
         return new CreateAsSelectDataSetup(new PrestoSqlExecutor(getQueryRunner()), tableNamePrefix);
diff --git a/presto-tests/src/main/java/io/prestosql/tests/datatype/DataType.java b/presto-tests/src/main/java/io/prestosql/tests/datatype/DataType.java
index 0aebae247f44b..f244eab1c0da0 100644
--- a/presto-tests/src/main/java/io/prestosql/tests/datatype/DataType.java
+++ b/presto-tests/src/main/java/io/prestosql/tests/datatype/DataType.java
@@ -30,12 +30,14 @@
 import java.util.Optional;
 import java.util.function.Function;
 
+import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Strings.padEnd;
 import static com.google.common.io.BaseEncoding.base16;
 import static io.prestosql.spi.type.CharType.createCharType;
 import static io.prestosql.spi.type.DateType.DATE;
 import static io.prestosql.spi.type.DecimalType.createDecimalType;
 import static io.prestosql.spi.type.VarcharType.createUnboundedVarcharType;
+import static io.prestosql.type.JsonType.JSON;
 import static java.lang.String.format;
 import static java.math.RoundingMode.UNNECESSARY;
 import static java.util.function.Function.identity;
@@ -150,6 +152,18 @@ public static DataType<LocalDate> dateDataType()
                 identity());
     }
 
+    public static DataType<String> jsonDataType()
+    {
+        return dataType(
+                "json",
+                JSON,
+                value -> {
+                    checkArgument(!value.contains("'"));
+                    return format("JSON '%s'", value);
+                },
+                identity());
+    }
+
     private static String quote(String value)
     {
         return "'" + value + "'";