diff --git a/src/cljConnection.ts b/src/cljConnection.ts
index 70a2949..30ccf7b 100644
--- a/src/cljConnection.ts
+++ b/src/cljConnection.ts
@@ -154,7 +154,7 @@ const disconnect = (showMessage: boolean = true): void => {
         vscode.window.showWarningMessage('Not connected to any nREPL.');
 };
 
-const getLocalNReplPort = (): number => {
+const getLocalNReplPort = (): number | undefined => {
     const projectDir = vscode.workspace.rootPath;
 
     if (projectDir) {
@@ -164,7 +164,9 @@ const getLocalNReplPort = (): number => {
     }
 
     const homeDir = process.env.HOME || process.env.HOMEPATH || process.env.USERPROFILE;
-    return getPortFromFS(path.join(homeDir, '.lein', 'repl-port'));
+    if (homeDir) {
+        return getPortFromFS(path.join(homeDir, '.lein', 'repl-port'));
+    }
 };
 
 const getPortFromFS = (path: string): number => fs.existsSync(path) ? Number.parseInt(fs.readFileSync(path, 'utf-8')) : NaN;
diff --git a/src/clojureEval.ts b/src/clojureEval.ts
index 10d9a9e..f671196 100644
--- a/src/clojureEval.ts
+++ b/src/clojureEval.ts
@@ -118,9 +118,16 @@ function runTests(outputChannel: vscode.OutputChannel, listener: TestListener, n
 
 export function testNamespace(outputChannel: vscode.OutputChannel, listener: TestListener): void {
     const editor = vscode.window.activeTextEditor;
-    const ns = cljParser.getNamespace(editor.document.getText()); // log ns and 'starting'
-    outputChannel.appendLine("Testing " + ns)
-    runTests(outputChannel, listener, ns);
+    if (editor) {
+        const text = editor.document.getText();
+        const ns = cljParser.getNamespace(text); // log ns and 'starting'
+        outputChannel.appendLine("Testing " + ns)
+        runTests(outputChannel, listener, ns);
+    } else {
+        // if having troubles with finding the namespace (though I'm not sure
+        // if it can actually happen), run all tests
+        runAllTests(outputChannel, listener);
+    }
 }
 
 export function runAllTests(outputChannel: vscode.OutputChannel, listener: TestListener): void {
diff --git a/src/nreplClient.ts b/src/nreplClient.ts
index dcd62df..030c6b2 100644
--- a/src/nreplClient.ts
+++ b/src/nreplClient.ts
@@ -74,7 +74,7 @@ const evaluateFile = (code: string, filepath: string, session?: string): Promise
 
 const stacktrace = (session: string): Promise<any> => send({ op: 'stacktrace', session: session });
 
-const runTests = function (namespace: string): Promise<any[]> {
+const runTests = function (namespace: string | undefined): Promise<any[]> {
     const message: TestMessage = {
         op: (namespace ? "test" : "test-all"),
         ns: namespace,
@@ -84,7 +84,7 @@ const runTests = function (namespace: string): Promise<any[]> {
 }
 
 
-const clone = (session?: string): Promise<any[]> => send({ op: 'clone', session: session }).then(respObjs => respObjs[0]);
+const clone = (session?: string): Promise<string> => send({ op: 'clone', session: session }).then(respObjs => respObjs[0]);
 
 const test = (connectionInfo: CljConnectionInformation): Promise<any[]> => {
     return send({ op: 'clone' }, connectionInfo)