diff --git a/DVR/Cassette.swift b/DVR/Cassette.swift
index 23f5b55..ec04bc1 100644
--- a/DVR/Cassette.swift
+++ b/DVR/Cassette.swift
@@ -19,11 +19,31 @@ struct Cassette {
     // MARK: - Functions
 
     func interactionForRequest(request: NSURLRequest) -> Interaction? {
+        print("REQUEST")
+        print(request.HTTPMethod)
+        print(request.URL)
+        if let body = request.HTTPBody {
+            print(Interaction.encodeBody(body, headers: request.allHTTPHeaderFields))
+        } else {
+            print("[empty body]")
+        }
+        print("")
         for interaction in interactions {
             let interactionRequest = interaction.request
 
+            print("INTERACTION")
+            print(interactionRequest.HTTPMethod)
+            print(interactionRequest.URL)
+            if let body = interactionRequest.HTTPBody {
+                print(Interaction.encodeBody(body, headers: interactionRequest.allHTTPHeaderFields))
+            } else {
+                print("[empty body]")
+            }
+            print("")
+
             // Note: We don't check headers right now
             if interactionRequest.HTTPMethod == request.HTTPMethod && interactionRequest.URL == request.URL && interactionRequest.hasHTTPBodyEqualToThatOfRequest(request)  {
+                print("MATCHED!")
                 return interaction
             }
         }
diff --git a/DVR/Session.swift b/DVR/Session.swift
index 5ec8029..0805e1a 100644
--- a/DVR/Session.swift
+++ b/DVR/Session.swift
@@ -66,7 +66,11 @@ public class Session: NSURLSession {
     }
 
     public override func uploadTaskWithRequest(request: NSURLRequest, fromFile fileURL: NSURL, completionHandler: (NSData?, NSURLResponse?, NSError?) -> Void) -> NSURLSessionUploadTask {
+        print(fileURL)
+        print("File exists: \(NSFileManager.defaultManager().fileExistsAtPath(fileURL.path!))")
         let data = NSData(contentsOfURL: fileURL)
+        print("DATA-2")
+        print(data)
         return addUploadTask(request, fromData: data, completionHandler: completionHandler)
     }
 
@@ -162,7 +166,12 @@ public class Session: NSURLSession {
 
     private func addUploadTask(request: NSURLRequest, fromData data: NSData?, completionHandler: SessionUploadTask.Completion? = nil) -> NSURLSessionUploadTask {
         var modifiedRequest = backingSession.configuration.HTTPAdditionalHeaders.map(request.requestByAppendingHeaders) ?? request
-        modifiedRequest = data.map(modifiedRequest.requestWithBody) ?? modifiedRequest
+        print("DATA-3")
+        print(data)
+        let mapped = data.map(modifiedRequest.requestWithBody)
+        print("MAPPED")
+        print(mapped)
+        modifiedRequest = mapped ?? modifiedRequest
         let task = SessionUploadTask(session: self, request: modifiedRequest, completion: completionHandler)
         addTask(task.dataTask)
         return task
diff --git a/DVR/Tests/SessionUploadTests.swift b/DVR/Tests/SessionUploadTests.swift
index 1c9ddb1..d39110a 100644
--- a/DVR/Tests/SessionUploadTests.swift
+++ b/DVR/Tests/SessionUploadTests.swift
@@ -25,6 +25,14 @@ class SessionUploadTests: XCTestCase {
         guard let fileData = NSData(contentsOfURL: testFile) else { XCTFail("Missing body data"); return }
         let data = encodeMultipartBody(fileData, parameters: [:])
         let file = writeDataToFile(data, fileName: "upload-file")
+        print("DATA")
+        print(data)
+        print("FILE")
+        print(file)
+        print("File exists: \(NSFileManager.defaultManager().fileExistsAtPath(file.path!))")
+        let check = NSData(contentsOfURL: file)
+        print("DATA-1.2")
+        print(check)
 
         session.uploadTaskWithRequest(request, fromFile: file) { data, response, error in
             if let error = error {
@@ -99,7 +107,9 @@ class SessionUploadTests: XCTestCase {
 
         let url = documentsURL.URLByAppendingPathComponent(fileName + ".tmp")
 
-        data.writeToURL(url, atomically: true)
+        if !data.writeToURL(url, atomically: true) {
+            XCTFail("Failed to write to \(url)")
+        }
         return url
     }