diff --git a/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DerbyLegacySqlAstTranslator.java b/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DerbyLegacySqlAstTranslator.java
index a17629b0c1..a404f0915a 100644
--- a/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DerbyLegacySqlAstTranslator.java
+++ b/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DerbyLegacySqlAstTranslator.java
@@ -210,7 +210,7 @@ public class DerbyLegacySqlAstTranslator<T extends JdbcOperation> extends Abstra
 			if ( inListPredicate.isNegated() ) {
 				appendSql( " not" );
 			}
-			appendSql( " in(" );
+			appendSql( " in (" );
 			renderCommaSeparated( listExpressions );
 			appendSql( CLOSE_PARENTHESIS );
 		}
diff --git a/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/FirebirdSqlAstTranslator.java b/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/FirebirdSqlAstTranslator.java
index 63a0f0f9c2..4eaa45abe6 100644
--- a/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/FirebirdSqlAstTranslator.java
+++ b/hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/FirebirdSqlAstTranslator.java
@@ -238,7 +238,7 @@ public class FirebirdSqlAstTranslator<T extends JdbcOperation> extends AbstractS
 			if ( inListPredicate.isNegated() ) {
 				appendSql( " not" );
 			}
-			appendSql( " in(" );
+			appendSql( " in (" );
 			renderCommaSeparated( listExpressions );
 			appendSql( CLOSE_PARENTHESIS );
 		}
diff --git a/hibernate-core/src/main/java/org/hibernate/sql/ast/spi/AbstractSqlAstTranslator.java b/hibernate-core/src/main/java/org/hibernate/sql/ast/spi/AbstractSqlAstTranslator.java
index 0c456545a4..3bd9f0e348 100644
--- a/hibernate-core/src/main/java/org/hibernate/sql/ast/spi/AbstractSqlAstTranslator.java
+++ b/hibernate-core/src/main/java/org/hibernate/sql/ast/spi/AbstractSqlAstTranslator.java
@@ -6770,7 +6770,7 @@ public abstract class AbstractSqlAstTranslator<T extends JdbcOperation> implemen
 					if ( inListPredicate.isNegated() ) {
 						appendSql( " not" );
 					}
-					appendSql( " in(" );
+					appendSql( " in (" );
 					String separator = NO_SEPARATOR;
 					for ( Expression expression : listExpressions ) {
 						appendSql( separator );
@@ -6802,7 +6802,7 @@ public abstract class AbstractSqlAstTranslator<T extends JdbcOperation> implemen
 		if ( inListPredicate.isNegated() ) {
 			appendSql( " not" );
 		}
-		appendSql( " in(" );
+		appendSql( " in (" );
 		String separator = NO_SEPARATOR;
 
 		int bindValueCount = listExpressions.size();
@@ -6868,7 +6868,7 @@ public abstract class AbstractSqlAstTranslator<T extends JdbcOperation> implemen
 				if ( inListPredicate.isNegated() ) {
 					appendSql( " not" );
 				}
-				appendSql( " in(" );
+				appendSql( " in (" );
 				separator = NO_SEPARATOR;
 				itemNumber = 0;
 				while ( iterator.hasNext() && itemNumber < inExprLimit ) {
@@ -7421,7 +7421,7 @@ public abstract class AbstractSqlAstTranslator<T extends JdbcOperation> implemen
 					if ( operator == ComparisonOperator.NOT_EQUAL ) {
 						appendSql( " not" );
 					}
-					appendSql( " in(" );
+					appendSql( " in (" );
 					renderExpressionsAsSubquery( rhsTuple.getExpressions() );
 					appendSql( CLOSE_PARENTHESIS );
 				}
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndClassIdTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndClassIdTest.java
index 05cf450721..79ed265b1e 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndClassIdTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndClassIdTest.java
@@ -100,8 +100,8 @@ public class BatchAndClassIdTest {
 						Assertions.assertThat( statementInspector.getSqlQueries().get( 2 ) ).containsOnlyOnce( "?" );
 					}
 					else {
-						Assertions.assertThat( statementInspector.getSqlQueries().get( 1 ) ).containsOnlyOnce( "in(?,?,?,?,?)" );
-						Assertions.assertThat( statementInspector.getSqlQueries().get( 2 ) ).containsOnlyOnce( "in(?,?,?,?,?)" );
+						Assertions.assertThat( statementInspector.getSqlQueries().get( 1 ) ).containsOnlyOnce( "in (?,?,?,?,?)" );
+						Assertions.assertThat( statementInspector.getSqlQueries().get( 2 ) ).containsOnlyOnce( "in (?,?,?,?,?)" );
 					}
 
 					statementInspector.clear();
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdId2Test.java b/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdId2Test.java
index ce638c9631..33b43c851e 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdId2Test.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdId2Test.java
@@ -100,8 +100,8 @@ public class BatchAndEmbeddedIdId2Test {
 						Assertions.assertThat( statementInspector.getSqlQueries().get( 2 ) ).containsOnlyOnce( "?" );
 					}
 					else {
-						Assertions.assertThat( statementInspector.getSqlQueries().get( 1 ) ).containsOnlyOnce( "in(?,?,?,?,?)" );
-						Assertions.assertThat( statementInspector.getSqlQueries().get( 2 ) ).containsOnlyOnce( "in(?,?,?,?,?)" );
+						Assertions.assertThat( statementInspector.getSqlQueries().get( 1 ) ).containsOnlyOnce( "in (?,?,?,?,?)" );
+						Assertions.assertThat( statementInspector.getSqlQueries().get( 2 ) ).containsOnlyOnce( "in (?,?,?,?,?)" );
 					}
 
 					statementInspector.clear();
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdIdAndLazyCollectionTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdIdAndLazyCollectionTest.java
index 58fb999b28..a63f60a9ef 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdIdAndLazyCollectionTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdIdAndLazyCollectionTest.java
@@ -108,8 +108,8 @@ public class BatchAndEmbeddedIdIdAndLazyCollectionTest {
 						Assertions.assertThat( statementInspector.getSqlQueries().get( 1 ) ).containsOnlyOnce( "?" );
 					}
 					else {
-						Assertions.assertThat( statementInspector.getSqlQueries().get( 0 ) ).containsOnlyOnce( "in(?,?,?,?,?)" );
-						Assertions.assertThat( statementInspector.getSqlQueries().get( 1 ) ).containsOnlyOnce( "in(?,?,?,?,?)" );
+						Assertions.assertThat( statementInspector.getSqlQueries().get( 0 ) ).containsOnlyOnce( "in (?,?,?,?,?)" );
+						Assertions.assertThat( statementInspector.getSqlQueries().get( 1 ) ).containsOnlyOnce( "in (?,?,?,?,?)" );
 					}
 				}
 		);
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdIdTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdIdTest.java
index 6e1c2f46d1..036773d2e2 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdIdTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEmbeddedIdIdTest.java
@@ -98,8 +98,8 @@ public class BatchAndEmbeddedIdIdTest {
 				assertThat( statementInspector.getSqlQueries().get( 2 ) ).containsOnlyOnce( "?" );
 			}
 			else {
-				assertThat( statementInspector.getSqlQueries().get( 1 ) ).containsOnlyOnce( "in(?,?,?,?,?)" );
-				assertThat( statementInspector.getSqlQueries().get( 2 ) ).containsOnlyOnce( "in(?,?,?,?,?)" );
+				assertThat( statementInspector.getSqlQueries().get( 1 ) ).containsOnlyOnce( "in (?,?,?,?,?)" );
+				assertThat( statementInspector.getSqlQueries().get( 2 ) ).containsOnlyOnce( "in (?,?,?,?,?)" );
 			}
 
 			statementInspector.clear();
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/query/InClauseParameterPaddingCriteriaTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/query/InClauseParameterPaddingCriteriaTest.java
index e5f0942705..f2330902b0 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/query/InClauseParameterPaddingCriteriaTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/query/InClauseParameterPaddingCriteriaTest.java
@@ -75,7 +75,7 @@ public class InClauseParameterPaddingCriteriaTest {
 			assertEquals( 1, ids.size() );
 		} );
 
-		assertTrue( statementInspector.getSqlQueries().get( 0 ).endsWith( "in(?,?,?,?,?,?,?,?)" ) );
+		assertTrue( statementInspector.getSqlQueries().get( 0 ).endsWith( "in (?,?,?,?,?,?,?,?)" ) );
 	}
 
 	@Test
@@ -102,7 +102,7 @@ public class InClauseParameterPaddingCriteriaTest {
 			assertEquals( 1, ids.size() );
 		} );
 
-		assertTrue( statementInspector.getSqlQueries().get( 0 ).endsWith( "in(d1_0.id,d1_0.id,d1_0.id)" ) );
+		assertTrue( statementInspector.getSqlQueries().get( 0 ).endsWith( "in (d1_0.id,d1_0.id,d1_0.id)" ) );
 	}
 
 	@Entity(name = "Document")
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/query/InClauseParameterPaddingTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/query/InClauseParameterPaddingTest.java
index c4dcd2f505..8dbea28adc 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/query/InClauseParameterPaddingTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/query/InClauseParameterPaddingTest.java
@@ -54,16 +54,16 @@ public class InClauseParameterPaddingTest {
 
 	@Test
 	public void testInClauseParameterPadding(EntityManagerFactoryScope scope) {
-		validateInClauseParameterPadding( scope, "in(?)", 1 );
-		validateInClauseParameterPadding( scope, "in(?,?)", 1, 2 );
-		validateInClauseParameterPadding( scope, "in(?,?,?,?)", 1, 2, 3 );
-		validateInClauseParameterPadding( scope, "in(?,?,?,?)", 1, 2, 3, 4 );
-		validateInClauseParameterPadding( scope, "in(?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5 );
-		validateInClauseParameterPadding( scope, "in(?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6 );
-		validateInClauseParameterPadding( scope, "in(?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6, 7 );
-		validateInClauseParameterPadding( scope, "in(?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6, 7, 8 );
-		validateInClauseParameterPadding( scope, "in(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6, 7, 8, 9 );
-		validateInClauseParameterPadding( scope, "in(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 );
+		validateInClauseParameterPadding( scope, "in (?)", 1 );
+		validateInClauseParameterPadding( scope, "in (?,?)", 1, 2 );
+		validateInClauseParameterPadding( scope, "in (?,?,?,?)", 1, 2, 3 );
+		validateInClauseParameterPadding( scope, "in (?,?,?,?)", 1, 2, 3, 4 );
+		validateInClauseParameterPadding( scope, "in (?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5 );
+		validateInClauseParameterPadding( scope, "in (?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6 );
+		validateInClauseParameterPadding( scope, "in (?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6, 7 );
+		validateInClauseParameterPadding( scope, "in (?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6, 7, 8 );
+		validateInClauseParameterPadding( scope, "in (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6, 7, 8, 9 );
+		validateInClauseParameterPadding( scope, "in (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 );
 	}
 
 	private void validateInClauseParameterPadding(
diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/query/MaxInExpressionParameterPaddingTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/query/MaxInExpressionParameterPaddingTest.java
index a4579dc7a5..c260f861d3 100644
--- a/hibernate-core/src/test/java/org/hibernate/orm/test/query/MaxInExpressionParameterPaddingTest.java
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/query/MaxInExpressionParameterPaddingTest.java
@@ -83,7 +83,7 @@ public class MaxInExpressionParameterPaddingTest {
 			);
 
 		StringBuilder expectedInClause = new StringBuilder();
-		expectedInClause.append( "in(?" );
+		expectedInClause.append( "in (?" );
 		for ( int i = 1; i < MAX_COUNT; i++ ) {
 			expectedInClause.append( ",?" );
 		}
@@ -109,7 +109,7 @@ public class MaxInExpressionParameterPaddingTest {
 		);
 
 		StringBuilder expectedInClause = new StringBuilder();
-		expectedInClause.append( "in(?" );
+		expectedInClause.append( "in (?" );
 		for ( int i = 1; i < MAX_COUNT; i++ ) {
 			expectedInClause.append( ",?" );
 		}
@@ -134,12 +134,12 @@ public class MaxInExpressionParameterPaddingTest {
 		);
 
 		StringBuilder expectedInClause = new StringBuilder();
-		expectedInClause.append( "in(?" );
+		expectedInClause.append( "in (?" );
 		for ( int i = 1; i < MAX_COUNT; i++ ) {
 			expectedInClause.append( ",?" );
 		}
 		expectedInClause.append( ")" );
-		expectedInClause.append( " or p1_0.id in(?)" );
+		expectedInClause.append( " or p1_0.id in (?)" );
 
 		assertTrue( statementInspector.getSqlQueries().get( 0 ).endsWith( expectedInClause.toString() ) );
 	}
@@ -160,12 +160,12 @@ public class MaxInExpressionParameterPaddingTest {
 		);
 
 		StringBuilder expectedInClause = new StringBuilder();
-		expectedInClause.append( "in(?" );
+		expectedInClause.append( "in (?" );
 		for ( int i = 1; i < MAX_COUNT; i++ ) {
 			expectedInClause.append( ",?" );
 		}
 		expectedInClause.append( ")" );
-		expectedInClause.append( " or p1_0.id in(?,?,?,?)" );
+		expectedInClause.append( " or p1_0.id in (?,?,?,?)" );
 
 		assertTrue( statementInspector.getSqlQueries().get( 0 ).endsWith( expectedInClause.toString() ) );
 	}
@@ -186,17 +186,17 @@ public class MaxInExpressionParameterPaddingTest {
 		);
 
 		StringBuilder expectedInClause = new StringBuilder();
-		expectedInClause.append( "in(?" );
+		expectedInClause.append( "in (?" );
 		for ( int i = 1; i < MAX_COUNT; i++ ) {
 			expectedInClause.append( ",?" );
 		}
 		expectedInClause.append( ")" );
-		expectedInClause.append( " or p1_0.id in(?");
+		expectedInClause.append( " or p1_0.id in (?");
 		for ( int i = 1; i < MAX_COUNT; i++ ) {
 			expectedInClause.append( ",?" );
 		}
 		expectedInClause.append( ")" );
-		expectedInClause.append( " or p1_0.id in(?,?,?,?)" );
+		expectedInClause.append( " or p1_0.id in (?,?,?,?)" );
 
 
 		assertTrue( statementInspector.getSqlQueries().get( 0 ).endsWith( expectedInClause.toString() ) );