diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/boot/models/xml/override/JoinColumnProcessingTests.java b/hibernate-core/src/test/java/org/hibernate/orm/test/boot/models/xml/override/JoinColumnProcessingTests.java
new file mode 100644
index 000000000000..f70180ceed80
--- /dev/null
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/boot/models/xml/override/JoinColumnProcessingTests.java
@@ -0,0 +1,81 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.boot.models.xml.override;
+
+import jakarta.persistence.CollectionTable;
+import jakarta.persistence.Column;
+import jakarta.persistence.ElementCollection;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import org.hibernate.annotations.OnDelete;
+import org.hibernate.annotations.OnDeleteAction;
+import org.hibernate.mapping.Collection;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.DomainModelScope;
+import org.hibernate.testing.orm.junit.Jira;
+import org.junit.jupiter.api.Test;
+
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/// The report (HHH-15510) states that `@JoinColumn` defined on the class
+/// is not processed when the class is "mapped" using XML - the class is
+/// really more just "specified" via XML.
+///
+/// @author Steve Ebersole
+@DomainModel(
+		xmlMappings = "org/hibernate/orm/test/jpa/xml/joincolumn-processing.xml"
+)
+@Jira( "https://hibernate.atlassian.net/browse/HHH-15510" )
+public class JoinColumnProcessingTests {
+	@Test
+	void verifyModel(DomainModelScope modelScope) {
+		final var postBinding = modelScope.getEntityBinding( Post.class );
+
+		final var poster = postBinding.getProperty( "poster" );
+		final var posterValue = (org.hibernate.mapping.ManyToOne) poster.getValue();
+		assertThat( posterValue.getColumns() ).hasSize( 1 );
+		assertThat( posterValue.getColumns().get( 0 ).getName() ).isEqualTo( "poster_fk" );
+
+		final var tags = postBinding.getProperty( "tags" );
+		final var tagsValue = (Collection) tags.getValue();
+		assertThat( tagsValue.getCollectionTable().getName() ).isEqualTo( "post_tags" );
+		assertThat( tagsValue.getKey().getColumns() ).hasSize( 1 );
+		assertThat( tagsValue.getKey().getColumns().get( 0 ).getName() ).isEqualTo( "post_fk" );
+		assertThat( tagsValue.getKey().isCascadeDeleteEnabled() ).isTrue();
+		assertThat( tagsValue.getElement().getColumns() ).hasSize( 1 );
+		assertThat( tagsValue.getElement().getColumns().get( 0 ).getName() ).isEqualTo( "txt" );
+	}
+
+	@Entity(name="Person")
+	@Table(name="persons")
+	public static class Person {
+		@Id
+		private Integer id;
+		private String name;
+	}
+
+	@Entity(name="Post")
+	@Table(name="posts")
+	public static class Post {
+		@Id
+		private Integer id;
+		private String name;
+		@ManyToOne
+		@JoinColumn(name="poster_fk")
+		private Person poster;
+		@ElementCollection
+		@CollectionTable(name = "post_tags",
+				joinColumns = @JoinColumn(name = "post_fk")
+		)
+		@OnDelete(action = OnDeleteAction.CASCADE)
+		@Column(name = "txt")
+		private Set<String> tags;
+	}
+}
diff --git a/hibernate-core/src/test/resources/org/hibernate/orm/test/jpa/xml/joincolumn-processing.xml b/hibernate-core/src/test/resources/org/hibernate/orm/test/jpa/xml/joincolumn-processing.xml
new file mode 100644
index 000000000000..b088b0327341
--- /dev/null
+++ b/hibernate-core/src/test/resources/org/hibernate/orm/test/jpa/xml/joincolumn-processing.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+  ~ SPDX-License-Identifier: Apache-2.0
+  ~ Copyright Red Hat Inc. and Hibernate Authors
+  -->
+<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm"
+                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+                 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_2_0.xsd"
+                 version="2.0">
+    <entity class="org.hibernate.orm.test.boot.models.xml.override.JoinColumnProcessingTests$Person"/>
+    <entity class="org.hibernate.orm.test.boot.models.xml.override.JoinColumnProcessingTests$Post"/>
+</entity-mappings>
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