diff --git a/auto-configurations/mcp/spring-ai-autoconfigure-mcp-client-common/src/test/java/org/springframework/ai/mcp/client/common/autoconfigure/configurer/McpAsyncClientConfigurerTests.java b/auto-configurations/mcp/spring-ai-autoconfigure-mcp-client-common/src/test/java/org/springframework/ai/mcp/client/common/autoconfigure/configurer/McpAsyncClientConfigurerTests.java
new file mode 100644
index 00000000000..43329af8c34
--- /dev/null
+++ b/auto-configurations/mcp/spring-ai-autoconfigure-mcp-client-common/src/test/java/org/springframework/ai/mcp/client/common/autoconfigure/configurer/McpAsyncClientConfigurerTests.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2025-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.ai.mcp.client.common.autoconfigure.configurer;
+
+import java.util.Collections;
+import java.util.List;
+
+import io.modelcontextprotocol.client.McpClient;
+import io.modelcontextprotocol.spec.McpClientTransport;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.InOrder;
+
+import org.springframework.ai.mcp.customizer.McpAsyncClientCustomizer;
+
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verifyNoInteractions;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+
+/**
+ * Unit tests for {@link McpAsyncClientConfigurer}.
+ *
+ * @author lance
+ */
+class McpAsyncClientConfigurerTests {
+
+	private McpAsyncClientCustomizer customizer1;
+
+	private McpAsyncClientCustomizer customizer2;
+
+	private McpClient.AsyncSpec spec;
+
+	private McpAsyncClientConfigurer configurer;
+
+	@BeforeEach
+	void setUp() {
+		this.customizer1 = mock(McpAsyncClientCustomizer.class);
+		this.customizer2 = mock(McpAsyncClientCustomizer.class);
+		this.spec = McpClient.async(mock(McpClientTransport.class));
+	}
+
+	@Test
+	void testConfigureWithCustomizersInOrder() {
+		this.configurer = new McpAsyncClientConfigurer(List.of(this.customizer1, this.customizer2));
+
+		McpClient.AsyncSpec result = this.configurer.configure("asyncClientA", this.spec);
+
+		InOrder inOrder = inOrder(this.customizer1, this.customizer2);
+		inOrder.verify(this.customizer1).customize("asyncClientA", this.spec);
+		inOrder.verify(this.customizer2).customize("asyncClientA", this.spec);
+
+		verifyNoMoreInteractions(this.customizer1, this.customizer2);
+		assertSame(this.spec, result);
+	}
+
+	@Test
+	void testConfigureWithoutCustomizers() {
+		this.configurer = new McpAsyncClientConfigurer(Collections.emptyList());
+
+		McpClient.AsyncSpec result = this.configurer.configure("asyncClientB", this.spec);
+
+		assertSame(this.spec, result);
+		verifyNoInteractions(this.customizer1, this.customizer2);
+	}
+
+}
diff --git a/auto-configurations/mcp/spring-ai-autoconfigure-mcp-client-common/src/test/java/org/springframework/ai/mcp/client/common/autoconfigure/configurer/McpSyncClientConfigurerTests.java b/auto-configurations/mcp/spring-ai-autoconfigure-mcp-client-common/src/test/java/org/springframework/ai/mcp/client/common/autoconfigure/configurer/McpSyncClientConfigurerTests.java
new file mode 100644
index 00000000000..d66a8a238c4
--- /dev/null
+++ b/auto-configurations/mcp/spring-ai-autoconfigure-mcp-client-common/src/test/java/org/springframework/ai/mcp/client/common/autoconfigure/configurer/McpSyncClientConfigurerTests.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2025-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.ai.mcp.client.common.autoconfigure.configurer;
+
+import java.util.List;
+
+import io.modelcontextprotocol.client.McpClient;
+import io.modelcontextprotocol.spec.McpClientTransport;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.ai.mcp.customizer.McpSyncClientCustomizer;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.only;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+
+/**
+ * Unit tests for {@link McpSyncClientConfigurer}.
+ *
+ * @author lance
+ */
+class McpSyncClientConfigurerTests {
+
+	private McpSyncClientCustomizer customizer1;
+
+	private McpSyncClientCustomizer customizer2;
+
+	private McpClient.SyncSpec spec;
+
+	private McpSyncClientConfigurer configurer;
+
+	@BeforeEach
+	void setUp() {
+		this.customizer1 = mock(McpSyncClientCustomizer.class);
+		this.customizer2 = mock(McpSyncClientCustomizer.class);
+		this.spec = McpClient.sync(mock(McpClientTransport.class));
+	}
+
+	@Test
+	void testConfigureWithCustomizers() {
+		this.configurer = new McpSyncClientConfigurer(List.of(this.customizer1, this.customizer2));
+		McpClient.SyncSpec result = this.configurer.configure("clientA", this.spec);
+
+		verify(this.customizer1, only()).customize("clientA", this.spec);
+		verify(this.customizer2, only()).customize("clientA", this.spec);
+
+		verifyNoMoreInteractions(this.customizer1, this.customizer2);
+		Assertions.assertSame(this.spec, result);
+	}
+
+	@Test
+	void testConfigureWithoutCustomizers() {
+		this.configurer = new McpSyncClientConfigurer(List.of());
+		McpClient.SyncSpec result = this.configurer.configure("clientB", this.spec);
+		Assertions.assertSame(this.spec, result);
+	}
+
+	@Test
+	void testConfigureWithNullCustomizers() {
+		this.configurer = new McpSyncClientConfigurer(null);
+		McpClient.SyncSpec result = this.configurer.configure("clientC", this.spec);
+		Assertions.assertSame(this.spec, result);
+	}
+
+}