diff --git a/core/src/main/java/org/testcontainers/utility/MountableFile.java b/core/src/main/java/org/testcontainers/utility/MountableFile.java
index 795917fffc4..cd83a81781f 100644
--- a/core/src/main/java/org/testcontainers/utility/MountableFile.java
+++ b/core/src/main/java/org/testcontainers/utility/MountableFile.java
@@ -301,7 +301,14 @@ private void recursiveTar(String entryFilename, String rootPath, String itemPath
             final File sourceRootFile = new File(rootPath).getCanonicalFile();     // e.g. /foo
             final String relativePathToSourceFile = sourceRootFile.toPath().relativize(sourceFile.toPath()).toFile().toString();    // e.g. /bar/baz
 
-            final TarArchiveEntry tarEntry = new TarArchiveEntry(sourceFile, entryFilename + "/" + relativePathToSourceFile); // entry filename e.g. /xyz/bar/baz
+            final String tarEntryFilename;
+            if (relativePathToSourceFile.isEmpty()) {
+                tarEntryFilename = entryFilename; // entry filename e.g. xyz => xyz
+            } else {
+                tarEntryFilename = entryFilename + "/" + relativePathToSourceFile; // entry filename e.g. /xyz/bar/baz => /foo/bar/baz
+            }
+
+            final TarArchiveEntry tarEntry = new TarArchiveEntry(sourceFile, tarEntryFilename.replaceAll("^/", ""));
 
             // TarArchiveEntry automatically sets the mode for file/directory, but we can update to ensure that the mode is set exactly (inc executable bits)
             tarEntry.setMode(getUnixFileMode(itemPath));
diff --git a/core/src/test/java/org/testcontainers/utility/MountableFileTest.java b/core/src/test/java/org/testcontainers/utility/MountableFileTest.java
index 9b1fbb55a53..c7dcaad2908 100644
--- a/core/src/test/java/org/testcontainers/utility/MountableFileTest.java
+++ b/core/src/test/java/org/testcontainers/utility/MountableFileTest.java
@@ -1,16 +1,21 @@
 package org.testcontainers.utility;
 
+import lombok.Cleanup;
+import org.apache.commons.compress.archivers.ArchiveEntry;
+import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
+import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
 import org.jetbrains.annotations.NotNull;
 import org.junit.Test;
 
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.function.Consumer;
 
-import static org.rnorth.visibleassertions.VisibleAssertions.assertEquals;
-import static org.rnorth.visibleassertions.VisibleAssertions.assertFalse;
-import static org.rnorth.visibleassertions.VisibleAssertions.assertTrue;
+import static org.rnorth.visibleassertions.VisibleAssertions.*;
 
 public class MountableFileTest {
 
@@ -79,7 +84,7 @@ public void forHostPathWithPlus() throws Exception {
     @Test
     public void forClasspathResourceWithPermission() throws Exception {
         final MountableFile mountableFile = MountableFile.forClasspathResource("mappable-resource/test-resource.txt",
-                TEST_FILE_MODE);
+            TEST_FILE_MODE);
 
         performChecks(mountableFile);
         assertEquals("Valid file mode.", BASE_FILE_MODE | TEST_FILE_MODE, mountableFile.getFileMode());
@@ -101,6 +106,31 @@ public void forHostDirPathWithPermission() throws Exception {
         assertEquals("Valid dir mode.", BASE_DIR_MODE | TEST_FILE_MODE, mountableFile.getFileMode());
     }
 
+    @Test
+    public void noTrailingSlashesInTarEntryNames() throws Exception {
+        final MountableFile mountableFile = MountableFile.forClasspathResource("mappable-resource/test-resource.txt");
+
+        @Cleanup final TarArchiveInputStream tais = intoTarArchive((taos) -> {
+            mountableFile.transferTo(taos, "/some/path.txt");
+            mountableFile.transferTo(taos, "/path.txt");
+            mountableFile.transferTo(taos, "path.txt");
+        });
+
+        ArchiveEntry entry;
+        while ((entry = tais.getNextEntry()) != null) {
+            assertFalse("no entries should have a trailing slash", entry.getName().endsWith("/"));
+        }
+    }
+
+    private TarArchiveInputStream intoTarArchive(Consumer<TarArchiveOutputStream> consumer) throws IOException {
+        @Cleanup final ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        @Cleanup final TarArchiveOutputStream taos = new TarArchiveOutputStream(baos);
+        consumer.accept(taos);
+        taos.close();
+
+        return new TarArchiveInputStream(new ByteArrayInputStream(baos.toByteArray()));
+    }
+
     @SuppressWarnings("ResultOfMethodCallIgnored")
     @NotNull
     private Path createTempFile(final String name) throws IOException {