diff --git a/filesystems/blob/src/main/scala/cromwell/filesystems/blob/BlobPathBuilder.scala b/filesystems/blob/src/main/scala/cromwell/filesystems/blob/BlobPathBuilder.scala
index aa6445fa779..35c518c0a43 100644
--- a/filesystems/blob/src/main/scala/cromwell/filesystems/blob/BlobPathBuilder.scala
+++ b/filesystems/blob/src/main/scala/cromwell/filesystems/blob/BlobPathBuilder.scala
@@ -174,5 +174,13 @@ case class BlobPath private[blob](pathString: String, endpoint: EndpointURL, con
     else pathString
   }
 
+  /**
+    * Returns the path relative to the container root.
+    * For example, https://{storageAccountName}.blob.core.windows.net/{containerid}/path/to/my/file
+    * will be returned as path/to/my/file.
+    * @return Path string relative to the container root.
+    */
+  def pathWithoutContainer : String = pathString
+  
   override def getSymlinkSafePath(options: LinkOption*): Path  = toAbsolutePath
 }
diff --git a/supportedBackends/tes/src/main/scala/cromwell/backend/impl/tes/TesJobPaths.scala b/supportedBackends/tes/src/main/scala/cromwell/backend/impl/tes/TesJobPaths.scala
index f1797d9bc58..a624a16328a 100644
--- a/supportedBackends/tes/src/main/scala/cromwell/backend/impl/tes/TesJobPaths.scala
+++ b/supportedBackends/tes/src/main/scala/cromwell/backend/impl/tes/TesJobPaths.scala
@@ -4,6 +4,7 @@ import com.typesafe.config.Config
 import cromwell.backend.io.{JobPaths, WorkflowPaths}
 import cromwell.backend.{BackendJobDescriptorKey, BackendWorkflowDescriptor}
 import cromwell.core.path._
+import cromwell.filesystems.blob.BlobPath
 
 object TesJobPaths {
   def apply(jobKey: BackendJobDescriptorKey,
@@ -30,12 +31,16 @@ case class TesJobPaths private[tes] (override val workflowPaths: TesWorkflowPath
 
   /*
    * tesTaskRoot: This is the root directory that TES will use for files related to this task.
-   * We provide it to TES as a k/v pair where the key is "internal_path_prefix" (specified in TesWorkflowOptionKeys.scala)
-   * and the value is a blob path.
+   * TES expects a path relative to the root of the storage container.
+   * We provide it to TES as a k/v pair where the key is "internal_path_prefix" and the value is the relative path string.
    * This is not a standard TES feature, but rather related to the Azure TES implementation that Terra uses.
    * While passing it outside of terra won't do any harm, we could consider making this optional and/or configurable.
    */
-  val tesTaskRoot : Path = callExecutionRoot.resolve("tes_task")
+  private val taskFullPath = callRoot./("tes_task")
+  val tesTaskRoot : String = taskFullPath match {
+    case blob: BlobPath => blob.pathWithoutContainer
+    case anyOtherPath: Path => anyOtherPath.pathAsString
+  }
 
   // Given an output path, return a path localized to the storage file system
   def storageOutput(path: String): String = {
diff --git a/supportedBackends/tes/src/main/scala/cromwell/backend/impl/tes/TesTask.scala b/supportedBackends/tes/src/main/scala/cromwell/backend/impl/tes/TesTask.scala
index 66f0f508d77..a345e87ebf7 100644
--- a/supportedBackends/tes/src/main/scala/cromwell/backend/impl/tes/TesTask.scala
+++ b/supportedBackends/tes/src/main/scala/cromwell/backend/impl/tes/TesTask.scala
@@ -242,7 +242,7 @@ final case class TesTask(jobDescriptor: BackendJobDescriptor,
   val resources: Resources = TesTask.makeResources(
     runtimeAttributes,
     preferedWorkflowExecutionIdentity,
-    Option(tesPaths.tesTaskRoot.pathAsString)
+    Option(tesPaths.tesTaskRoot)
   )
 }
 
diff --git a/supportedBackends/tes/src/test/scala/cromwell/backend/impl/tes/TesTaskSpec.scala b/supportedBackends/tes/src/test/scala/cromwell/backend/impl/tes/TesTaskSpec.scala
index 5bfa916086d..25a8f55f682 100644
--- a/supportedBackends/tes/src/test/scala/cromwell/backend/impl/tes/TesTaskSpec.scala
+++ b/supportedBackends/tes/src/test/scala/cromwell/backend/impl/tes/TesTaskSpec.scala
@@ -101,7 +101,7 @@ class TesTaskSpec
       TestConfig.emptyConfig)
 
     val expectedKey = "internal_path_prefix"
-    val expectedValue = Option(tesPaths.tesTaskRoot.pathAsString)
+    val expectedValue = Option(tesPaths.tesTaskRoot)
 
     //Assert path correctly ends up in the resources
     val wei = Option("abc123")