diff --git a/jimfs/src/main/java/com/google/common/jimfs/JimfsFileStore.java b/jimfs/src/main/java/com/google/common/jimfs/JimfsFileStore.java
index 021cf0ab..8827b3e4 100644
--- a/jimfs/src/main/java/com/google/common/jimfs/JimfsFileStore.java
+++ b/jimfs/src/main/java/com/google/common/jimfs/JimfsFileStore.java
@@ -240,6 +240,12 @@ public long getUnallocatedSpace() throws IOException {
     return disk.getUnallocatedSpace();
   }
 
+  @SuppressWarnings("MissingOverride") // FileStore.getBlockSize() is Java 10+
+  public long getBlockSize() throws IOException {
+    state.checkOpen();
+    return disk.blockSize();
+  }
+
   @Override
   public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {
     state.checkOpen();
diff --git a/jimfs/src/test/java/com/google/common/jimfs/ConfigurationTest.java b/jimfs/src/test/java/com/google/common/jimfs/ConfigurationTest.java
index 618fc8d6..afebecf8 100644
--- a/jimfs/src/test/java/com/google/common/jimfs/ConfigurationTest.java
+++ b/jimfs/src/test/java/com/google/common/jimfs/ConfigurationTest.java
@@ -228,6 +228,8 @@ public void testFileSystemForCustomConfiguration() throws IOException {
     assertThat(fs.supportedFileAttributeViews()).containsExactly("basic", "owner", "posix", "unix");
 
     Files.createFile(fs.getPath("/foo"));
+    assertThat(((JimfsFileStore) Iterables.getOnlyElement(fs.getFileStores())).getBlockSize())
+        .isEqualTo(10);
     assertThat(Files.getAttribute(fs.getPath("/foo"), "posix:permissions"))
         .isEqualTo(PosixFilePermissions.fromString("---------"));
     assertThat(Files.getAttribute(fs.getPath("/foo"), "creationTime"))
diff --git a/jimfs/src/test/java/com/google/common/jimfs/JimfsUnixLikeFileSystemTest.java b/jimfs/src/test/java/com/google/common/jimfs/JimfsUnixLikeFileSystemTest.java
index 6a8dcd5f..5f50148f 100644
--- a/jimfs/src/test/java/com/google/common/jimfs/JimfsUnixLikeFileSystemTest.java
+++ b/jimfs/src/test/java/com/google/common/jimfs/JimfsUnixLikeFileSystemTest.java
@@ -142,6 +142,9 @@ public void testFileStore() throws IOException {
 
     long totalSpace = 1024 * 1024 * 1024; // 1 GB
     assertThat(fileStore.getTotalSpace()).isEqualTo(totalSpace);
+    // Default unix block size; FileStore.getBlockSize() is Java 10+, so call the Jimfs method
+    // directly (same package) so this still compiles on Java 8.
+    assertThat(((JimfsFileStore) fileStore).getBlockSize()).isEqualTo(8192);
     assertThat(fileStore.getUnallocatedSpace()).isEqualTo(totalSpace);
     assertThat(fileStore.getUsableSpace()).isEqualTo(totalSpace);