Maybe this will work? Travis and YAML are undocumented nightmares

.travis.yml

@@ -23,5 +23,8 @@ env:
     - NODEJS_VERSION=0.10
   matrix:
     - TestRun=JSIL.Tests.DeadCodeEliminationTest,JSIL.Tests.APITests,JSIL.Tests.AnalysisTests,JSIL.Tests.ComparisonTests,JSIL.Tests.ConfigurationTests,JSIL.Tests.DependencyTests,JSIL.Tests.FailingTests,JSIL.Tests.FormattingTests,JSIL.Tests.GenericsTests,JSIL.Tests.MetadataTests,JSIL.Tests.PerformanceTests,JSIL.Tests.TypeInformationTests,JSIL.Tests.UnsafeTests,JSIL.Tests.VerbatimTests,JSIL.Tests.XMLTests,JSIL.Tests.ThreadingTests
+      JSIL_STORAGE_TAG=misc-tests
     - TestRun=JSIL.SimpleTests.SimpleTests,JSIL.SimpleTests.SimpleTestCasesForStubbedBcl
+      JSIL_STORAGE_TAG=stubbed-tests
     - TestRun=JSIL.SimpleTests.SimpleTestCasesForTranslatedBcl
+      JSIL_STORAGE_TAG=translated-tests

ci/download-compile-cache.sh

@@ -1,8 +1,9 @@
 #!/bin/bash
 
-if curl "jsil.org/ci/download.aspx?key=travisci-compilecache&password=$JSIL_STORAGE_PASSWORD" -o "/tmp/compilecache.zip"; then
+if curl -S "jsil.org/ci/download.aspx?key=travisci&tag=$JSIL_STORAGE_TAG&password=$JSIL_STORAGE_PASSWORD" -o "/tmp/compilecache.zip"; then
     echo "Failed to download compile cache."
 else
-    echo "Downloaded and unpacked compile cache."
+    echo "Downloaded compile cache."
     unzip -o "/tmp/compilecache.zip" -d /tmp/JSIL Tests/
+    echo "Unpacked compile cache."
 fi

ci/upload-compile-cache.sh

@@ -2,7 +2,7 @@
 
 zip -3 -r "/tmp/compilecache.zip" "/tmp/JSIL Tests/*"
 
-if curl -X POST "jsil.org/ci/upload.aspx?key=travisci-compilecache&password=$JSIL_STORAGE_PASSWORD" --data-binary "@/tmp/compilecache.zip"; then
+if curl -S -X POST "jsil.org/ci/upload.aspx?key=travisci&tag=$JSIL_STORAGE_TAG&password=$JSIL_STORAGE_PASSWORD" --data-binary "@/tmp/compilecache.zip"; then
     echo "Failed to upload compile cache."
 else
     echo "Uploaded compile cache."

jsil.org/ci/App_Code/common.cs

@@ -39,6 +39,8 @@ protected bool SetupRequest (out string targetPath) {
             return false;
         }
 
+        var tag = Request.Params["tag"] ?? "";
+
         var targetDir = Path.Combine(
             Path.GetTempPath(),
             "JSIL CI"
@@ -47,7 +49,10 @@ protected bool SetupRequest (out string targetPath) {
         if (!Directory.Exists(targetDir))
             Directory.CreateDirectory(targetDir);
 
-        targetPath = Path.Combine(targetDir, key + ".bin");
+        targetPath = Path.Combine(
+            targetDir, 
+            string.Format("{0}-{1}.bin", key, tag)
+        );
         return true;
     }
 }