diff --git a/src/Explorer/Graph/GraphExplorerComponent/GraphData.ts b/src/Explorer/Graph/GraphExplorerComponent/GraphData.ts
index 420d98e5e..9cbf502bd 100644
--- a/src/Explorer/Graph/GraphExplorerComponent/GraphData.ts
+++ b/src/Explorer/Graph/GraphExplorerComponent/GraphData.ts
@@ -413,13 +413,13 @@ export class GraphData<V extends GremlinVertex, E extends GremlinEdge> {
    * @param node
    * @param prop
    */
-  public static getNodePropValue(node: D3Node, prop: string): string | number | boolean {
+  public static getNodePropValue(node: D3Node, prop: string): undefined | string | number | boolean {
     if (node.hasOwnProperty(prop)) {
       return (node as any)[prop];
     }
 
     // This is DocDB specific
-    if (node.hasOwnProperty("properties") && node.properties.hasOwnProperty(prop)) {
+    if (node.properties && node.properties.hasOwnProperty(prop)) {
       return node.properties[prop][0]["value"];
     }
 
@@ -496,7 +496,7 @@ export class GraphData<V extends GremlinVertex, E extends GremlinEdge> {
    * Get list of children ids of a given vertex
    * @param vertex
    */
-  private static getChildrenId(vertex: GremlinVertex): string[] {
+  public static getChildrenId(vertex: GremlinVertex): string[] {
     const ids = <any>{}; // HashSet
     if (vertex.hasOwnProperty("outE")) {
       let outE = vertex.outE;
diff --git a/src/Explorer/Notebook/NotebookComponent/__mocks__/rx-jupyter.ts b/src/Explorer/Notebook/NotebookComponent/__mocks__/rx-jupyter.ts
index 1472d5f5d..564527eec 100644
--- a/src/Explorer/Notebook/NotebookComponent/__mocks__/rx-jupyter.ts
+++ b/src/Explorer/Notebook/NotebookComponent/__mocks__/rx-jupyter.ts
@@ -1,14 +1,14 @@
 import { Observable, of } from "rxjs";
-import { AjaxResponse } from "rxjs/ajax";
-import { ServerConfig } from "rx-jupyter";
+import { AjaxRequest, AjaxResponse } from "rxjs/ajax";
+import { ServerConfig } from "@nteract/types";
 
 let fakeAjaxResponse: AjaxResponse = {
-  originalEvent: undefined,
+  originalEvent: <Event>(<unknown>undefined),
   xhr: new XMLHttpRequest(),
-  request: null,
+  request: <AjaxRequest>(<unknown>null),
   status: 200,
   response: {},
-  responseText: null,
+  responseText: "",
   responseType: "json"
 };
 export const sessions = {
diff --git a/tsconfig.strict.json b/tsconfig.strict.json
index e0432eb30..cc2adecd8 100644
--- a/tsconfig.strict.json
+++ b/tsconfig.strict.json
@@ -47,6 +47,9 @@
 	"./src/Explorer/Controls/InputTypeahead/InputTypeahead.ts",
     "./src/Explorer/Controls/SmartUi/InputUtils.ts",
     "./src/Explorer/Graph/GraphExplorerComponent/__mocks__/GremlinClient.ts",
+    "./src/Explorer/Graph/GraphExplorerComponent/EdgeInfoCache.ts",
+    "./src/Explorer/Graph/GraphExplorerComponent/GraphData.ts",
+    "./src/Explorer/Notebook/NotebookComponent/__mocks__/rx-jupyter.ts",
     "./src/Explorer/Notebook/FileSystemUtil.ts",
     "./src/Explorer/Notebook/NTeractUtil.ts",
     "./src/Explorer/Notebook/NotebookComponent/actions.ts",