diff --git a/src/harness/unittests/tsserverProjectSystem.ts b/src/harness/unittests/tsserverProjectSystem.ts
index e2c2a395581..a816bea1ae2 100644
--- a/src/harness/unittests/tsserverProjectSystem.ts
+++ b/src/harness/unittests/tsserverProjectSystem.ts
@@ -17,27 +17,13 @@ namespace ts.projectSystem {
         })
     };
 
-    const typeMapList = {
+    const customSafeList = {
         path: <Path>"/typeMapList.json",
         content: JSON.stringify({
-            "jquery": {
-                // jquery files can have names like "jquery-1.10.2.min.js" (or "jquery.intellisense.js")
-                "match": "/jquery(-(\\.?\\d+)+)?(\\.intellisense)?(\\.min)?\\.js$",
-                "types": ["jquery"]
+            "quack": {
+                "match": "/duckquack-(\\d+)\\.min\\.js",
+                "types": ["duck-types"]
             },
-            "WinJS": {
-                "match": "^(.*/winjs)/base\\.js$",           // If the winjs/base.js file is found..
-                "exclude": [["^", 1, "/.*"]],                       // ..then exclude all files under the winjs folder
-                "types": ["winjs"]                           // And fetch the @types package for WinJS
-            },
-            "Office Nuget": {
-                "match": "^(.*/1/office)/excel\\.debug\\.js$", // Office NuGet package is installed under a "1/office" folder
-                "exclude": [["^", 1, "/.*"]],                         // Exclude that whole folder if the file indicated above is found in it
-                "types": ["office"]                            // @types package to fetch instead
-            },
-            "Minified files": {
-                "match": "^.*\\.min\\.js$"                     // Catch-all for minified files. Default exclude is the matched file.
-            }
         })
     };
 
@@ -1432,17 +1418,20 @@ namespace ts.projectSystem {
                 content: "export let x = 5"
             };
             const office = {
-                path: "lib/1/office/excel.debug.js",
+                path: "/lib/duckquack-3.min.js",
                 content: "whoa do @@ not parse me ok thanks!!!"
             };
-            const host = createServerHost([typeMapList, file1, office]);
+            const host = createServerHost([customSafeList, file1, office]);
             const projectService = createProjectService(host);
-            projectService.loadSafeList(typeMapList.path);
-
-            projectService.openExternalProject({ projectFileName: "project", options: {}, rootFiles: toExternalFiles([file1.path, office.path]) });
-            const proj = projectService.externalProjects[0];
-            assert.deepEqual(proj.getFileNames(true), [file1.path]);
-            assert.deepEqual(proj.getTypeAcquisition().include, ["office"]);
+            projectService.loadSafeList(customSafeList.path);
+            try {
+                projectService.openExternalProject({ projectFileName: "project", options: {}, rootFiles: toExternalFiles([file1.path, office.path]) });
+                const proj = projectService.externalProjects[0];
+                assert.deepEqual(proj.getFileNames(true), [file1.path]);
+                assert.deepEqual(proj.getTypeAcquisition().include, ["duck-types"]);
+            } finally {
+                projectService.resetSafeList();
+            }
         });
 
         it("open file become a part of configured project if it is referenced from root file", () => {
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 4bbae55083d..fe060362550 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -61,6 +61,24 @@ namespace ts.server {
         "smart": IndentStyle.Smart
     });
 
+    const defaultTypeSafeList: SafeList = {
+        "jquery": {
+            // jquery files can have names like "jquery-1.10.2.min.js" (or "jquery.intellisense.js")
+            "match": /jquery(-(\.?\d+)+)?(\.intellisense)?(\.min)?\.js$/gi,
+            "types": ["jquery"]
+        },
+        "WinJS": {
+            "match": /^(.*\/winjs)\/base\.js$/gi,        // If the winjs/base.js file is found..
+            "exclude": [["^", 1, "/.*"]],                // ..then exclude all files under the winjs folder
+            "types": ["winjs"]                           // And fetch the @types package for WinJS
+        },
+        "Office Nuget": {
+            "match": /^(.*\/1\/office)\/excel\.debug\.js$/gi, // Office NuGet package is installed under a "1/office" folder
+            "exclude": [["^", 1, "/.*"]],                     // Exclude that whole folder if the file indicated above is found in it
+            "types": ["office"]                               // @types package to fetch instead
+        }
+    };
+
     export function convertFormatOptions(protocolOptions: protocol.FormatCodeSettings): FormatCodeSettings {
         if (typeof protocolOptions.indentStyle === "string") {
             protocolOptions.indentStyle = indentStyle.get(protocolOptions.indentStyle.toLowerCase());
@@ -263,7 +281,7 @@ namespace ts.server {
         private readonly throttledOperations: ThrottledOperations;
 
         private readonly hostConfiguration: HostConfiguration;
-        private static safelist: SafeList = {};
+        private static safelist: SafeList = defaultTypeSafeList;
 
         private changedFiles: ScriptInfo[];
 
@@ -1407,6 +1425,10 @@ namespace ts.server {
             return filename.replace(this.filenameEscapeRegexp, "\\$&");
         }
 
+        resetSafeList(): void {
+            ProjectService.safelist = defaultTypeSafeList;
+        }
+
         loadSafeList(fileName: string): void {
             const raw: SafeList = JSON.parse(this.host.readFile(fileName, "utf-8"));
             // Parse the regexps