diff --git a/build.gradle.kts b/build.gradle.kts
index ca022b6c..2bb26dba 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -57,7 +57,7 @@ dependencies {
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.10.0")
     testImplementation("org.apache.commons:commons-lang3:3.12.0")
     testImplementation("com.github.marschall:zipfilesystem-standalone:1.0.1")
-    testImplementation("com.github.marschall:memoryfilesystem:2.1.0")
+    testImplementation("com.github.marschall:memoryfilesystem:2.6.1")
     testImplementation("org.mockito:mockito-core:3.9.0")
     testImplementation("org.mockito:mockito-inline:3.9.0")
     testImplementation("org.mockito:mockito-junit-jupiter:3.9.0")
diff --git a/src/test/java/org/carlspring/cloud/storage/s3fs/util/S3ClientMock.java b/src/test/java/org/carlspring/cloud/storage/s3fs/util/S3ClientMock.java
index 7c0c17bb..489c6175 100644
--- a/src/test/java/org/carlspring/cloud/storage/s3fs/util/S3ClientMock.java
+++ b/src/test/java/org/carlspring/cloud/storage/s3fs/util/S3ClientMock.java
@@ -32,6 +32,7 @@
 import java.nio.file.StandardCopyOption;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.nio.file.attribute.FileAttribute;
+import java.nio.file.attribute.PosixFileAttributeView;
 import java.nio.file.attribute.PosixFileAttributes;
 import java.nio.file.attribute.PosixFilePermission;
 import java.time.Instant;
@@ -207,10 +208,22 @@ void addFile(final Path bucket,
 
         Path file = Files.createFile(bucket.resolve(fileName.replaceAll("/", "%2F")), attrs);
 
+        // This is needed for marschall/memoryfilesystem >= 2.6.1+
+        PosixFileAttributeView fileAttributeView = file.getFileSystem().provider().getFileAttributeView(file, PosixFileAttributeView.class);
+
+        Set<PosixFilePermission> perms = new HashSet<>();
+        perms.add(PosixFilePermission.OWNER_WRITE);
+        perms.add(PosixFilePermission.OWNER_READ);
+        perms.add(PosixFilePermission.OWNER_EXECUTE);
+
+        fileAttributeView.setPermissions(perms);
+        // /This is needed for marschall/memoryfilesystem >= 2.6.1+
+
         try (OutputStream outputStream = Files.newOutputStream(file))
         {
             outputStream.write(content);
         }
+
     }
 
     void addDirectory(final Path bucket,