diff --git a/build.gradle b/build.gradle
index 082e84c5109..79174b8eeb6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -40,7 +40,7 @@ ext {
 	log4jVersion         = "2.11.2"
 	nettyVersion         = "4.1.34.Final"
 	quartzVersion        = "2.3.0"
-	reactorVersion       = "Californium-SR6"
+	reactorVersion       = "Californium-BUILD-SNAPSHOT"
 	rxjavaVersion        = "1.3.8"
 	rxjavaAdapterVersion = "1.2.1"
 	rxjava2Version       = "2.2.8"
diff --git a/spring-core/src/main/java/org/springframework/core/io/buffer/DataBufferUtils.java b/spring-core/src/main/java/org/springframework/core/io/buffer/DataBufferUtils.java
index 359cf189c4b..40198ba9fa5 100644
--- a/spring-core/src/main/java/org/springframework/core/io/buffer/DataBufferUtils.java
+++ b/spring-core/src/main/java/org/springframework/core/io/buffer/DataBufferUtils.java
@@ -57,12 +57,6 @@ public abstract class DataBufferUtils {
 
 	private static final Consumer<DataBuffer> RELEASE_CONSUMER = DataBufferUtils::release;
 
-	/**
-	 * Workaround to disable use of pooled buffers:
-	 * https://github.com/reactor/reactor-core/issues/1634.
-	 */
-	private static final DataBufferFactory defaultDataBufferFactory = new DefaultDataBufferFactory();
-
 
 	//---------------------------------------------------------------------
 	// Reading
@@ -141,14 +135,12 @@ public abstract class DataBufferUtils {
 		Assert.isTrue(position >= 0, "'position' must be >= 0");
 		Assert.isTrue(bufferSize > 0, "'bufferSize' must be > 0");
 
-		DataBufferFactory bufferFactoryToUse = defaultDataBufferFactory;
-
 		Flux<DataBuffer> flux = Flux.using(channelSupplier,
 				channel -> Flux.create(sink -> {
 					ReadCompletionHandler handler =
-							new ReadCompletionHandler(channel, sink, position, bufferFactoryToUse, bufferSize);
+							new ReadCompletionHandler(channel, sink, position, bufferFactory, bufferSize);
 					sink.onDispose(handler::dispose);
-					DataBuffer dataBuffer = bufferFactoryToUse.allocateBuffer(bufferSize);
+					DataBuffer dataBuffer = bufferFactory.allocateBuffer(bufferSize);
 					ByteBuffer byteBuffer = dataBuffer.asByteBuffer(0, bufferSize);
 					channel.read(byteBuffer, position, dataBuffer, handler);
 				}),
diff --git a/spring-core/src/test/java/org/springframework/core/io/buffer/DataBufferUtilsTests.java b/spring-core/src/test/java/org/springframework/core/io/buffer/DataBufferUtilsTests.java
index 02f980f5ff0..115d0fce6b6 100644
--- a/spring-core/src/test/java/org/springframework/core/io/buffer/DataBufferUtilsTests.java
+++ b/spring-core/src/test/java/org/springframework/core/io/buffer/DataBufferUtilsTests.java
@@ -49,7 +49,9 @@ import org.springframework.core.io.Resource;
 import org.springframework.core.io.buffer.support.DataBufferTestUtils;
 
 import static org.junit.Assert.*;
-import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.*;
+import static org.mockito.Mockito.anyLong;
+import static org.mockito.Mockito.isA;
 import static org.mockito.Mockito.*;
 
 /**