diff --git a/geowebcache/core/src/main/java/org/geowebcache/util/TMSKeyBuilder.java b/geowebcache/core/src/main/java/org/geowebcache/util/TMSKeyBuilder.java
index 4263d78e5..e8ac9b1eb 100644
--- a/geowebcache/core/src/main/java/org/geowebcache/util/TMSKeyBuilder.java
+++ b/geowebcache/core/src/main/java/org/geowebcache/util/TMSKeyBuilder.java
@@ -194,7 +194,7 @@ public String parametersMetadataPrefix(final String layerName) {
      * @return the key prefix up to the coordinates (i.e. {@code
      *     "<prefix>/<layer>/<gridset>/<format>/<parametersId>"})
      */
-    public String coordinatesPrefix(TileRange obj, boolean endWithSlah) {
+    public String coordinatesPrefix(TileRange obj, boolean endWithSlash) {
         checkNotNull(obj.getLayerName());
         checkNotNull(obj.getGridSetId());
         checkNotNull(obj.getMimeType());
@@ -215,7 +215,7 @@ public String coordinatesPrefix(TileRange obj, boolean endWithSlah) {
         }
         String shortFormat = mimeType.getFileExtension(); // png, png8, png24, etc
 
-        String key = join(endWithSlah, prefix, layer, gridset, shortFormat, parametersId);
+        String key = join(endWithSlash, prefix, layer, gridset, shortFormat, parametersId);
         return key;
     }
 
diff --git a/geowebcache/s3storage/src/main/java/org/geowebcache/s3/S3BlobStore.java b/geowebcache/s3storage/src/main/java/org/geowebcache/s3/S3BlobStore.java
index 4bc8c6076..4c222ef70 100644
--- a/geowebcache/s3storage/src/main/java/org/geowebcache/s3/S3BlobStore.java
+++ b/geowebcache/s3storage/src/main/java/org/geowebcache/s3/S3BlobStore.java
@@ -311,7 +311,7 @@ public KeyVersion apply(long[] loc) {
     @Override
     public boolean delete(final TileRange tileRange) throws StorageException {
 
-        final String coordsPrefix = keyBuilder.coordinatesPrefix(tileRange, false);
+        final String coordsPrefix = keyBuilder.coordinatesPrefix(tileRange, true);
         if (!s3Ops.prefixExists(coordsPrefix)) {
             return false;
         }
diff --git a/geowebcache/s3storage/src/test/java/org/geowebcache/s3/OfflineS3BlobStoreIntegrationTest.java b/geowebcache/s3storage/src/test/java/org/geowebcache/s3/OfflineS3BlobStoreIntegrationTest.java
index 8b113c2c2..8ec7f6bc2 100644
--- a/geowebcache/s3storage/src/test/java/org/geowebcache/s3/OfflineS3BlobStoreIntegrationTest.java
+++ b/geowebcache/s3storage/src/test/java/org/geowebcache/s3/OfflineS3BlobStoreIntegrationTest.java
@@ -52,7 +52,6 @@ protected S3BlobStoreInfo getConfiguration() {
     }
 
     @Override
-    @Ignore // randomly fails
     @Test
     public void testTruncateOptimizationIfNoListeners() throws StorageException, MimeException {
         super.testTruncateOptimizationIfNoListeners();