diff --git a/sasjs-tests/package.json b/sasjs-tests/package.json
index 244b268..bec3a70 100644
--- a/sasjs-tests/package.json
+++ b/sasjs-tests/package.json
@@ -44,4 +44,4 @@
   "devDependencies": {
     "node-sass": "^4.14.1"
   }
-}
+}
\ No newline at end of file
diff --git a/sasjs-tests/src/App.test.js b/sasjs-tests/src/App.test.js
index 4db7ebc..e481fe7 100644
--- a/sasjs-tests/src/App.test.js
+++ b/sasjs-tests/src/App.test.js
@@ -5,5 +5,6 @@ import App from './App';
 test('renders learn react link', () => {
   const { getByText } = render(<App />);
   const linkElement = getByText(/learn react/i);
+
   expect(linkElement).toBeInTheDocument();
 });
diff --git a/sasjs-tests/src/App.tsx b/sasjs-tests/src/App.tsx
index 4ede90b..9899fc8 100644
--- a/sasjs-tests/src/App.tsx
+++ b/sasjs-tests/src/App.tsx
@@ -9,9 +9,7 @@ const App = (): ReactElement<{}> => {
   const { adapter } = useContext(AppContext);
 
   useEffect(() => {
-    if (adapter) {
-      adapter.setDebugState(debug);
-    }
+    if (adapter) adapter.setDebugState(debug);
   }, [debug, adapter]);
 
   useEffect(() => {
@@ -33,7 +31,7 @@ const App = (): ReactElement<{}> => {
             <label className="switch">
               <input
                 type="checkbox"
-                onChange={(e) => setDebug(e.target.checked)}
+                onChange={(e) => setDebug(e.target.checked)} // FIXME: rename 'e' => 'event'
               />
               <span className="knob"></span>
             </label>
@@ -45,7 +43,7 @@ const App = (): ReactElement<{}> => {
             type="text"
             className="app-loc-input"
             value={appLoc}
-            onChange={(e) => setAppLoc(e.target.value)}
+            onChange={(e) => setAppLoc(e.target.value)} // FIXME: rename 'e' => 'event'
             placeholder="AppLoc"
           />
         </div>
diff --git a/sasjs-tests/src/Login.tsx b/sasjs-tests/src/Login.tsx
index 158f908..7447c86 100644
--- a/sasjs-tests/src/Login.tsx
+++ b/sasjs-tests/src/Login.tsx
@@ -9,11 +9,14 @@ const Login = (): ReactElement<{}> => {
   const appContext = useContext(AppContext);
 
   const handleSubmit = useCallback(
-    (e) => {
+    (e) => { // FIXME: rename 'e' => 'event'
       e.preventDefault();
-      appContext.adapter.logIn(username, password).then(() => {
-        appContext.setIsLoggedIn(true);
-      });
+
+      appContext.adapter.logIn(username, password)
+        .then(() => {
+            appContext.setIsLoggedIn(true);
+        });
+        // FIXME: catch block
     },
     [username, password, appContext]
   );
@@ -38,7 +41,7 @@ const Login = (): ReactElement<{}> => {
             type="password"
             value={password}
             required
-            onChange={(e) => setPassword(e.target.value)}
+            onChange={(e) => setPassword(e.target.value)} // FIXME: rename 'e' => 'event'
           />
         </div>
         <button type="submit" className="submit-button">
@@ -51,4 +54,4 @@ const Login = (): ReactElement<{}> => {
   );
 };
 
-export default Login;
+export default Login;
\ No newline at end of file
diff --git a/sasjs-tests/src/PrivateRoute.tsx b/sasjs-tests/src/PrivateRoute.tsx
index a70d282..2c3941b 100644
--- a/sasjs-tests/src/PrivateRoute.tsx
+++ b/sasjs-tests/src/PrivateRoute.tsx
@@ -8,16 +8,14 @@ interface PrivateRouteProps {
   path: string;
 }
 
-const PrivateRoute = (
-  props: PrivateRouteProps
-): ReactElement<PrivateRouteProps> => {
+const PrivateRoute = (props: PrivateRouteProps): ReactElement<PrivateRouteProps> => {
   const { component, path, exact } = props;
   const appContext = useContext(AppContext);
-  return appContext.isLoggedIn ? (
+
+  return appContext.isLoggedIn ?
     <Route component={component} path={path} exact={exact} />
-  ) : (
+    :
     <Redirect to="/login" />
-  );
 };
 
-export default PrivateRoute;
+export default PrivateRoute;
\ No newline at end of file
diff --git a/sasjs-tests/src/TestSuiteRunner.tsx b/sasjs-tests/src/TestSuiteRunner.tsx
index ff5271b..0a2ec30 100644
--- a/sasjs-tests/src/TestSuiteRunner.tsx
+++ b/sasjs-tests/src/TestSuiteRunner.tsx
@@ -2,25 +2,24 @@ import React, { useEffect, useState, ReactElement, useContext } from "react";
 import TestSuiteComponent from "./components/TestSuite";
 import TestSuiteCard from "./components/TestSuiteCard";
 import { TestSuite, Test } from "./types";
-import { basicTests } from "./testSuites/Basic";
+import { basicTests } from "./testSuites/Basic"; // FIXME: declared but never used
 import "./TestSuiteRunner.scss";
 import SASjs from "sasjs";
 import { AppContext } from "./context/AppContext";
-import { sendArrTests, sendObjTests } from "./testSuites/RequestData";
+import { sendArrTests, sendObjTests } from "./testSuites/RequestData"; // FIXME: declared but never used
 import { specialCaseTests } from "./testSuites/SpecialCases";
-import { sasjsRequestTests } from "./testSuites/SasjsRequests";
+import { sasjsRequestTests } from "./testSuites/SasjsRequests"; // FIXME: declared but never used
 
 interface TestSuiteRunnerProps {
   adapter: SASjs;
 }
-const TestSuiteRunner = (
-  props: TestSuiteRunnerProps
-): ReactElement<TestSuiteRunnerProps> => {
+
+const TestSuiteRunner = (props: TestSuiteRunnerProps): ReactElement<TestSuiteRunnerProps> => {
   const { adapter } = props;
-  const { config } = useContext(AppContext);
+  const { config } = useContext(AppContext); // FIXME: declared but never used
   const [testSuites, setTestSuites] = useState<TestSuite[]>([]);
   const [runTests, setRunTests] = useState(false);
-  const [completedTestSuites, setCompletedTestSuites] = useState<
+  const [completedTestSuites, setCompletedTestSuites] = useState< // FIXME: create interface
     {
       name: string;
       completedTests: {
@@ -65,20 +64,23 @@ const TestSuiteRunner = (
     <>
       <div className="button-container">
         <button
-          className={runTests ? "submit-button disabled" : "submit-button"}
+          className={runTests ? "submit-button disabled" : "submit-button"} // TODO: 'submit-button' class should be assigned by default
           onClick={() => setRunTests(true)}
           disabled={runTests}
         >
           {runTests ? (
             <>
-              <div className="loading-spinner"></div>Running tests...
+            {
+                // FIXME: fragment is not needed in this case
+            }
+              <div className="loading-spinner"></div>Running tests... 
             </>
           ) : (
             "Run tests!"
           )}
         </button>
       </div>
-      {completedTestSuites.map((completedTestSuite, index) => {
+      {completedTestSuites.map((completedTestSuite, index) => { // TODO: refactor
         return (
           <TestSuiteCard
             key={index}
@@ -100,22 +102,19 @@ const TestSuiteRunner = (
             }[]
           ) => {
             const currentIndex = testSuites.indexOf(currentTestSuite);
-            const nextIndex =
-              currentIndex < testSuites.length - 1 ? currentIndex + 1 : -1;
-            if (nextIndex >= 0) {
-              setCurrentTestSuite(testSuites[nextIndex]);
-            } else {
-              setCurrentTestSuite(null);
-            }
+            const nextIndex = currentIndex < testSuites.length - 1 ? currentIndex + 1 : -1;
+
+            if (nextIndex >= 0) setCurrentTestSuite(testSuites[nextIndex]);
+            else setCurrentTestSuite(null);
+
             const newCompletedTestSuites = [
               ...completedTestSuites,
               { name, completedTests },
             ];
+
             setCompletedTestSuites(newCompletedTestSuites);
 
-            if (newCompletedTestSuites.length === testSuites.length) {
-              setRunTests(false);
-            }
+            if (newCompletedTestSuites.length === testSuites.length) setRunTests(false);
           }}
         />
       )}
@@ -123,4 +122,4 @@ const TestSuiteRunner = (
   );
 };
 
-export default TestSuiteRunner;
+export default TestSuiteRunner;
\ No newline at end of file
diff --git a/sasjs-tests/src/components/Test.tsx b/sasjs-tests/src/components/Test.tsx
index 6d13850..b10f560 100644
--- a/sasjs-tests/src/components/Test.tsx
+++ b/sasjs-tests/src/components/Test.tsx
@@ -1,6 +1,6 @@
 import React, { ReactElement, useEffect, useState } from "react";
 import TestCard from "./TestCard";
-import { start } from "repl";
+import { start } from "repl"; // FIXME: declared but never used
 
 interface TestProps {
   title: string;
@@ -39,28 +39,36 @@ const Test = (props: TestProps): ReactElement<TestProps> => {
 
   useEffect(() => {
     if (test && assertion) {
-      const startTime = new Date().valueOf();
+      const startTime = new Date().valueOf()
+
       setIsRunning(true);
       setIsPassed(false);
+
       beforeTestFunction()
         .then(() => test(context))
         .then((res) => {
           setIsRunning(false);
-          setIsPassed(assertion(res, context));
+          setIsPassed(assertion(res, context))
+
           return Promise.resolve(assertion(res, context));
         })
         .then((testResult) => {
           afterTestFunction();
+
           const endTime = new Date().valueOf();
           const executionTime = (endTime - startTime) / 1000;
+
           onCompleted({ result: testResult, error: null, executionTime });
         })
         .catch((e) => {
           setIsRunning(false);
           setIsPassed(false);
+
           console.error(e);
+
           const endTime = new Date().valueOf();
           const executionTime = (endTime - startTime) / 1000;
+
           onCompleted({ result: false, error: e, executionTime });
         });
     }
@@ -76,4 +84,4 @@ const Test = (props: TestProps): ReactElement<TestProps> => {
   );
 };
 
-export default Test;
+export default Test;
\ No newline at end of file
diff --git a/sasjs-tests/src/components/TestCard.tsx b/sasjs-tests/src/components/TestCard.tsx
index 404f39c..7934247 100644
--- a/sasjs-tests/src/components/TestCard.tsx
+++ b/sasjs-tests/src/components/TestCard.tsx
@@ -18,7 +18,7 @@ const TestCard = (props: TestCardProps): ReactElement<TestCardProps> => {
       <span className="execution-time">
         {executionTime ? executionTime.toFixed(2) + "s" : ""}
       </span>
-      {status === "running" && (
+      {status === "running" && ( // FIXME: use switch statement
         <div>
           <span className="icon running"></span>Running...
         </div>
@@ -40,4 +40,4 @@ const TestCard = (props: TestCardProps): ReactElement<TestCardProps> => {
   );
 };
 
-export default TestCard;
+export default TestCard;
\ No newline at end of file
diff --git a/sasjs-tests/src/components/TestSuite.tsx b/sasjs-tests/src/components/TestSuite.tsx
index 850d141..787aa41 100644
--- a/sasjs-tests/src/components/TestSuite.tsx
+++ b/sasjs-tests/src/components/TestSuite.tsx
@@ -22,7 +22,7 @@ interface TestSuiteProps {
 const TestSuite = (props: TestSuiteProps): ReactElement<TestSuiteProps> => {
   const { name, tests, beforeAll, afterAll, onCompleted } = props;
   const [context, setContext] = useState<any>(null);
-  const [completedTests, setCompletedTests] = useState<
+  const [completedTests, setCompletedTests] = useState< // TODO: create an interface
     {
       test: Test;
       result: boolean;
@@ -31,24 +31,21 @@ const TestSuite = (props: TestSuiteProps): ReactElement<TestSuiteProps> => {
     }[]
   >([]);
   const [currentTest, setCurrentTest] = useState<Test | null>(
-    (null as unknown) as Test
+    (null as unknown) as Test // ?
   );
 
   useEffect(() => {
-    if (beforeAll) {
-      beforeAll().then((data) => setContext({ data }));
-    }
+    if (beforeAll) beforeAll().then((data) => setContext({ data }))
   }, [beforeAll]);
 
   useEffect(() => {
-    if (tests.length) {
-      setCurrentTest(tests[0]);
-    }
+    if (tests.length) setCurrentTest(tests[0])
+
     setCompletedTests([]);
     setContext(null);
   }, [tests]);
 
-  return (!!beforeAll && !!context) || !beforeAll ? (
+  return (!!beforeAll && !!context) || !beforeAll ? ( // ?
     <div className="test-suite">
       <div className="test-suite-name running">{name}</div>
       {currentTest && (
@@ -64,29 +61,27 @@ const TestSuite = (props: TestSuiteProps): ReactElement<TestSuiteProps> => {
                 error: completedTest.error,
                 executionTime: completedTest.executionTime,
               },
-            ];
+            ]
+
             setCompletedTests(newCompleteTests);
+
             const currentIndex = tests.indexOf(currentTest);
-            const nextIndex =
-              currentIndex < tests.length - 1 ? currentIndex + 1 : -1;
-            if (nextIndex >= 0) {
-              setCurrentTest(tests[nextIndex]);
-            } else {
-              setCurrentTest(null);
-            }
+            const nextIndex = currentIndex < tests.length - 1 ? currentIndex + 1 : -1;
+
+            if (nextIndex >= 0) setCurrentTest(tests[nextIndex]);
+            else setCurrentTest(null);
+
             if (newCompleteTests.length === tests.length) {
-              if (afterAll) {
-                afterAll().then(() => onCompleted(name, newCompleteTests));
-              } else {
-                onCompleted(name, newCompleteTests);
-              }
+              if (afterAll) afterAll().then(() => onCompleted(name, newCompleteTests))
+              else onCompleted(name, newCompleteTests)
             }
           }}
         />
       )}
-      {completedTests.map((completedTest, index) => {
-        const { test, result, error } = completedTest;
+      {completedTests.map((test, index) => {
+        const { test, result, error } = test;
         const { title, description } = test;
+
         return (
           <TestCard
             key={index}
@@ -99,8 +94,8 @@ const TestSuite = (props: TestSuiteProps): ReactElement<TestSuiteProps> => {
       })}
     </div>
   ) : (
-    <></>
+    <></> // FIXME: use {null} instead
   );
 };
 
-export default TestSuite;
+export default TestSuite;
\ No newline at end of file
diff --git a/sasjs-tests/src/components/TestSuiteCard.tsx b/sasjs-tests/src/components/TestSuiteCard.tsx
index c573e03..382058f 100644
--- a/sasjs-tests/src/components/TestSuiteCard.tsx
+++ b/sasjs-tests/src/components/TestSuiteCard.tsx
@@ -12,20 +12,19 @@ interface TestSuiteCardProps {
     executionTime: number;
   }[];
 }
-const TestSuiteCard = (
-  props: TestSuiteCardProps
-): ReactElement<TestSuiteCardProps> => {
+const TestSuiteCard = (props: TestSuiteCardProps): ReactElement<TestSuiteCardProps> => {
   const { name, tests } = props;
-  const overallStatus = tests.map((t) => t.result).reduce((x, y) => x && y);
+  const overallStatus = tests.map((t) => t.result).reduce((x, y) => x && y); // TODO: refactor variable names
 
   return (
     <div className="test-suite">
       <div className={`test-suite-name ${overallStatus ? "passed" : "failed"}`}>
         {name}
       </div>
-      {tests.map((completedTest, index) => {
-        const { test, result, error, executionTime } = completedTest;
+      {tests.map((test, index) => {
+        const { test, result, error, executionTime } = test;
         const { title, description } = test;
+
         return (
           <TestCard
             key={index}
diff --git a/sasjs-tests/src/context/AppContext.tsx b/sasjs-tests/src/context/AppContext.tsx
index 69a671d..d569b1e 100644
--- a/sasjs-tests/src/context/AppContext.tsx
+++ b/sasjs-tests/src/context/AppContext.tsx
@@ -1,9 +1,9 @@
 import React, { createContext, useState, useEffect, ReactNode } from "react";
 import SASjs from "sasjs";
 
-export const AppContext = createContext<{
-  config: any;
-  sasJsConfig: any;
+export const AppContext = createContext<{ // TODO: create an interface
+  config: any; // TODO: be more specific on type declaration
+  sasJsConfig: any; // TODO: be more specific on type declaration
   isLoggedIn: boolean;
   setIsLoggedIn: (value: boolean) => void;
   adapter: SASjs;
@@ -16,25 +16,24 @@ export const AppContext = createContext<{
 });
 
 export const AppProvider = (props: { children: ReactNode }) => {
-  const [config, setConfig] = useState<{ sasJsConfig: any }>({
-    sasJsConfig: null,
-  });
-
+  const [config, setConfig] = useState<{ sasJsConfig: any }>({sasJsConfig: null}); // TODO: be more specific on type declaration
   const [adapter, setAdapter] = useState<SASjs>((null as unknown) as SASjs);
-
   const [isLoggedIn, setIsLoggedIn] = useState(false);
 
   useEffect(() => {
-    fetch("config.json")
+    fetch("config.json") // TODO: use axios instead of fetch
       .then((res) => res.json())
-      .then((configJson: any) => {
+      .then((configJson: any) => { // TODO: be more specific on type declaration
         setConfig(configJson);
+
         const sasjs = new SASjs(configJson.sasJsConfig);
+
         setAdapter(sasjs);
+
         sasjs.checkSession().then((response) => {
           setIsLoggedIn(response.isLoggedIn);
-        });
-      });
+        }); // FIXME: add catch block
+      });// FIXME: add catch block
   }, []);
 
   return (
@@ -50,4 +49,4 @@ export const AppProvider = (props: { children: ReactNode }) => {
       {props.children}
     </AppContext.Provider>
   );
-};
+};
\ No newline at end of file
diff --git a/sasjs-tests/src/testSuites/Basic.ts b/sasjs-tests/src/testSuites/Basic.ts
index 1096fc5..9f9c576 100644
--- a/sasjs-tests/src/testSuites/Basic.ts
+++ b/sasjs-tests/src/testSuites/Basic.ts
@@ -33,18 +33,16 @@ export const basicTests = (
       test: async () => {
         return adapter.logIn(userName, password);
       },
-      assertion: (response: any) =>
+      assertion: (response: any) => // FIXME: be more specific on type declaration
         response && response.isLoggedIn && response.userName === userName,
     },
     {
       title: "Default config",
-      description:
-        "Should instantiate with default config when none is provided",
-      test: async () => {
-        return Promise.resolve(new SASjs());
-      },
+      description: "Should instantiate with default config when none is provided",
+      test: async () => Promise.resolve(new SASjs()),
       assertion: (sasjsInstance: SASjs) => {
         const sasjsConfig = sasjsInstance.getSasjsConfig();
+        
         return (
           sasjsConfig.serverUrl === defaultConfig.serverUrl &&
           sasjsConfig.pathSAS9 === defaultConfig.pathSAS9 &&
diff --git a/sasjs-tests/src/testSuites/RequestData.ts b/sasjs-tests/src/testSuites/RequestData.ts
index c6e0419..6ffabd7 100644
--- a/sasjs-tests/src/testSuites/RequestData.ts
+++ b/sasjs-tests/src/testSuites/RequestData.ts
@@ -1,12 +1,12 @@
 import SASjs from "sasjs";
 import { TestSuite } from "../types";
 
-const stringData: any = { table1: [{ col1: "first col value" }] };
-const numericData: any = { table1: [{ col1: 3.14159265 }] };
-const multiColumnData: any = {
+const stringData: any = { table1: [{ col1: "first col value" }] }; // TODO: be more specific on type declaration
+const numericData: any = { table1: [{ col1: 3.14159265 }] }; // TODO: be more specific on type declaration
+const multiColumnData: any = { // TODO: be more specific on type declaration
   table1: [{ col1: 42, col2: 1.618, col3: "x", col4: "x" }],
 };
-const multipleRowsWithNulls: any = {
+const multipleRowsWithNulls: any = { // TODO: be more specific on type declaration
   table1: [
     { col1: 42, col2: null, col3: "x", col4: "" },
     { col1: 42, col2: null, col3: "x", col4: "" },
@@ -15,7 +15,7 @@ const multipleRowsWithNulls: any = {
     { col1: 42, col2: 1.62, col3: "x", col4: "x" },
   ],
 };
-const multipleColumnsWithNulls: any = {
+const multipleColumnsWithNulls: any = { // TODO: be more specific on type declaration
   table1: [
     { col1: 42, col2: null, col3: "x", col4: null },
     { col1: 42, col2: null, col3: "x", col4: null },
@@ -25,21 +25,20 @@ const multipleColumnsWithNulls: any = {
   ],
 };
 
-const getLongStringData = (length = 32764) => {
+const getLongStringData = (length = 32764) => { // FIXME: add type declaration
   let x = "X";
-  for (let i = 1; i <= length; i++) {
-    x = x + "X";
-  }
-  const data: any = { table1: [{ col1: x }] };
+
+  for (let i = 1; i <= length; i++) x += 'X'
+
+  const data: any = { table1: [{ col1: x }] }; // TODO: be more specific on type declaration
+
   return data;
 };
 
 const getLargeObjectData = () => {
   const data = { table1: [{ big: "data" }] };
 
-  for (let i = 1; i < 10000; i++) {
-    data.table1.push(data.table1[0]);
-  }
+  for (let i = 1; i < 10000; i++) data.table1.push(data.table1[0])
 
   return data;
 };
@@ -50,12 +49,8 @@ export const sendArrTests = (adapter: SASjs): TestSuite => ({
     {
       title: "Single string value",
       description: "Should send an array with a single string value",
-      test: () => {
-        return adapter.request("common/sendArr", stringData);
-      },
-      assertion: (res: any) => {
-        return res.table1[0][0] === stringData.table1[0].col1;
-      },
+      test: () => adapter.request("common/sendArr", stringData),
+      assertion: (res: any) => res.table1[0][0] === stringData.table1[0].col1 // TODO: be more specific on type declaration
     },
     {
       title: "Long string value",
@@ -64,22 +59,17 @@ export const sendArrTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendArr", getLongStringData());
       },
-      assertion: (res: any) => {
-        const longStringData = getLongStringData();
-        return res.table1[0][0] === longStringData.table1[0].col1;
-      },
+      assertion: (res: any) => res.table1[0][0] === getLongStringData().table1[0].col1 // TODO: be more specific on type declaration
     },
     {
       title: "Overly long string value",
       description:
         "Should error out with long string values over 32765 characters",
-      test: () => {
-        return adapter
-          .request("common/sendArr", getLongStringData(32767))
-          .catch((e) => e);
-      },
-      assertion: (error: any) => {
-        return !!error && !!error.MESSAGE;
+      test: () => adapter
+        .request("common/sendArr", getLongStringData(32767))
+        .catch((e) => e), // TODO: rename
+      assertion: (error: any) => { // TODO: be more specific on type declaration
+        return !!error && !!error.MESSAGE; // FIXME: refactor
       },
     },
     {
@@ -88,7 +78,7 @@ export const sendArrTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendArr", numericData);
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         return res.table1[0][0] === numericData.table1[0].col1;
       },
     },
@@ -98,7 +88,7 @@ export const sendArrTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendArr", multiColumnData);
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         return (
           res.table1[0][0] === multiColumnData.table1[0].col1 &&
           res.table1[0][1] === multiColumnData.table1[0].col2 &&
@@ -113,9 +103,10 @@ export const sendArrTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendArr", multipleRowsWithNulls);
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         let result = true;
-        multipleRowsWithNulls.table1.forEach((_: any, index: number) => {
+        multipleRowsWithNulls.table1.forEach((_: any, index: number) => { // TODO: be more specific on type declaration
+            // FIXME: use loop
           result =
             result &&
             res.table1[index][0] === multipleRowsWithNulls.table1[index].col1;
@@ -129,6 +120,7 @@ export const sendArrTests = (adapter: SASjs): TestSuite => ({
             result &&
             res.table1[index][3] === multipleRowsWithNulls.table1[index].col4;
         });
+
         return result;
       },
     },
@@ -138,9 +130,9 @@ export const sendArrTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendArr", multipleColumnsWithNulls);
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         let result = true;
-        multipleColumnsWithNulls.table1.forEach((_: any, index: number) => {
+        multipleColumnsWithNulls.table1.forEach((_: any, index: number) => { // TODO: be more specific on type declaration
           result =
             result &&
             res.table1[index][0] ===
@@ -171,12 +163,12 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
       title: "Invalid column name",
       description: "Should throw an error",
       test: async () => {
-        const invalidData: any = {
+        const invalidData: any = { // TODO: be more specific on type declaration
           "1 invalid table": [{ col1: 42 }],
         };
         return adapter.request("common/sendObj", invalidData).catch((e) => e);
       },
-      assertion: (error: any) => !!error && !!error.MESSAGE,
+      assertion: (error: any) => !!error && !!error.MESSAGE, // TODO: be more specific on type declaration
     },
     {
       title: "Single string value",
@@ -184,7 +176,7 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendObj", stringData);
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         return res.table1[0].COL1 === stringData.table1[0].col1;
       },
     },
@@ -195,7 +187,7 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendObj", getLongStringData());
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         const longStringData = getLongStringData();
         return res.table1[0].COL1 === longStringData.table1[0].col1;
       },
@@ -209,7 +201,7 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
           .request("common/sendObj", getLongStringData(32767))
           .catch((e) => e);
       },
-      assertion: (error: any) => {
+      assertion: (error: any) => { // TODO: be more specific on type declaration
         return !!error && !!error.MESSAGE;
       },
     },
@@ -219,7 +211,7 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendObj", numericData);
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         return res.table1[0].COL1 === numericData.table1[0].col1;
       },
     },
@@ -230,7 +222,7 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendObj", getLargeObjectData());
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         const data = getLargeObjectData();
         return res.table1[9000].BIG === data.table1[9000].big;
       },
@@ -241,7 +233,7 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendObj", multiColumnData);
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         return (
           res.table1[0].COL1 === multiColumnData.table1[0].col1 &&
           res.table1[0].COL2 === multiColumnData.table1[0].col2 &&
@@ -256,9 +248,9 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendObj", multipleRowsWithNulls);
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         let result = true;
-        multipleRowsWithNulls.table1.forEach((_: any, index: number) => {
+        multipleRowsWithNulls.table1.forEach((_: any, index: number) => { // TODO: be more specific on type declaration
           result =
             result &&
             res.table1[index].COL1 === multipleRowsWithNulls.table1[index].col1;
@@ -281,9 +273,9 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
       test: () => {
         return adapter.request("common/sendObj", multipleColumnsWithNulls);
       },
-      assertion: (res: any) => {
+      assertion: (res: any) => { // TODO: be more specific on type declaration
         let result = true;
-        multipleColumnsWithNulls.table1.forEach((_: any, index: number) => {
+        multipleColumnsWithNulls.table1.forEach((_: any, index: number) => { // TODO: be more specific on type declaration
           result =
             result &&
             res.table1[index].COL1 ===
@@ -305,4 +297,4 @@ export const sendObjTests = (adapter: SASjs): TestSuite => ({
       },
     },
   ],
-});
+});
\ No newline at end of file
diff --git a/sasjs-tests/src/testSuites/SasjsRequests.ts b/sasjs-tests/src/testSuites/SasjsRequests.ts
index c8fca52..2c9ed29 100644
--- a/sasjs-tests/src/testSuites/SasjsRequests.ts
+++ b/sasjs-tests/src/testSuites/SasjsRequests.ts
@@ -1,7 +1,7 @@
 import SASjs from "sasjs";
 import { TestSuite } from "../types";
 
-const data: any = { table1: [{ col1: "first col value" }] };
+const data: any = { table1: [{ col1: "first col value" }] }; // TODO: be more specific on type declaration
 
 export const sasjsRequestTests = (adapter: SASjs): TestSuite => ({
   name: "SASjs Requests",
@@ -9,16 +9,11 @@ export const sasjsRequestTests = (adapter: SASjs): TestSuite => ({
     {
       title: "WORK tables",
       description: "Should get WORK tables after request",
-      test: async () => {
-        return adapter.request("common/sendArr", data);
-      },
+      test: async () => adapter.request("common/sendArr", data),
       assertion: (res: any) => {
         const requests = adapter.getSasRequests();
-        if (adapter.getSasjsConfig().debug) {
-          return requests[0].SASWORK !== null;
-        } else {
-          return requests[0].SASWORK === null;
-        }
+
+        return adapter.getSasjsConfig().debug ? requests[0].SASWORK !== null : requests[0].SASWORK === null
       },
     },
   ],
diff --git a/sasjs-tests/src/testSuites/SpecialCases.ts b/sasjs-tests/src/testSuites/SpecialCases.ts
index 697145a..77ed18d 100644
--- a/sasjs-tests/src/testSuites/SpecialCases.ts
+++ b/sasjs-tests/src/testSuites/SpecialCases.ts
@@ -1,7 +1,7 @@
 import SASjs from "sasjs";
 import { TestSuite } from "../types";
 
-const specialCharData: any = {
+const specialCharData: any = { // TODO: be more specific on type definition 
   table1: [
     {
       tab: "\t",
@@ -9,8 +9,8 @@ const specialCharData: any = {
       cr: "\r",
       semicolon: ";semi",
       percent: "%",
-      singleQuote: "'",
-      doubleQuote: '"',
+      singleQuote: "'", // TODO: use ``
+      doubleQuote: '"', // TODO: use ``
       crlf: "\r\n",
       euro: "€euro",
       banghash: "!#banghash",
@@ -18,7 +18,7 @@ const specialCharData: any = {
   ],
 };
 
-const moreSpecialCharData: any = {
+const moreSpecialCharData: any = { // TODO: be more specific on type definition 
   table1: [
     {
       speech0: '"speech',
@@ -36,44 +36,46 @@ const moreSpecialCharData: any = {
   ],
 };
 
-const getWideData = () => {
-  const cols: any = {};
-  for (let i = 1; i <= 10000; i++) {
+const getWideData = () => { // FIXME: declared but never used
+  const cols: any = {}; // TODO: be more specific on type definition 
+  for (let i = 1; i <= 10000; i++) { // Why 10000?
     cols["col" + i] = "test" + i;
   }
 
-  const data: any = {
+  const data: any = { // TODO: be more specific on type definition 
     table1: [cols],
   };
 
   return data;
 };
 
-const getTables = () => {
-  const tables: any = {};
+const getTables = () => { // FIXME: declared but never used
+  const tables: any = {}; // TODO: be more specific on type definition 
 
-  for (let i = 1; i <= 100; i++) {
+  for (let i = 1; i <= 100; i++) { // why 100
     tables["table" + i] = [{ col1: "x", col2: "x", col3: "x", col4: "x" }];
   }
+
   return tables;
 };
 
 const getLargeDataset = () => {
-  const rows: any = [];
-  const colData: string =
-    "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
+  const rows: any = []; // TODO: be more specific on type definition 
+  const colData: string = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; // FIXME: no need to explicitly mention data type
+
   for (let i = 1; i <= 10000; i++) {
     rows.push({ col1: colData, col2: colData, col3: colData, col4: colData });
   }
 
-  const data: any = {
+  const data: any = { // TODO: be more specific on type definition 
     table1: rows,
   };
 
   return data;
 };
 
-const errorAndCsrfData: any = {
+// FIXME: declared but never used
+const errorAndCsrfData: any = { // TODO: be more specific on type definition 
   error: [{ col1: "q", col2: "w", col3: "e", col4: "r" }],
   _csrf: [{ col1: "q", col2: "w", col3: "e", col4: "r" }],
 };
@@ -84,10 +86,8 @@ export const specialCaseTests = (adapter: SASjs): TestSuite => ({
     {
       title: "Common special characters",
       description: "Should handle common special characters",
-      test: () => {
-        return adapter.request("common/sendArr", specialCharData);
-      },
-      assertion: (res: any) => {
+      test: () => adapter.request("common/sendArr", specialCharData),
+      assertion: (res: any) => { // TODO: be more specific on type definition 
         return (
           res.table1[0][0] === specialCharData.table1[0].tab &&
           res.table1[0][1] === specialCharData.table1[0].lf &&
@@ -102,6 +102,8 @@ export const specialCaseTests = (adapter: SASjs): TestSuite => ({
         );
       },
     },
+    // TODO: delete commented out code
+
     // {
     //   title: "Other special characters",
     //   description: "Should handle other special characters",
@@ -180,15 +182,15 @@ export const specialCaseTests = (adapter: SASjs): TestSuite => ({
     {
       title: "Large dataset",
       description: "Should handle 5mb of data",
-      test: () => {
-        return adapter.request("common/sendArr", getLargeDataset());
-      },
-      assertion: (res: any) => {
+      test: () => adapter.request("common/sendArr", getLargeDataset()),
+      assertion: (res: any) => { // TODO: be more specific on type definition 
         const data = getLargeDataset();
-        let result = true;
+        let result = true; // TODO: rename
+
         for (let i = 0; i <= 10; i++) {
           result = result && res.table1[i][0] === data.table1[i][0];
         }
+
         return result;
       },
     },
@@ -232,4 +234,4 @@ export const specialCaseTests = (adapter: SASjs): TestSuite => ({
     //   },
     // },
   ],
-});
+});
\ No newline at end of file
diff --git a/sasjs-tests/src/types/index.ts b/sasjs-tests/src/types/index.ts
index 832aca1..0a6f2ea 100644
--- a/sasjs-tests/src/types/index.ts
+++ b/sasjs-tests/src/types/index.ts
@@ -12,4 +12,4 @@ export interface TestSuite {
   tests: Test[];
   beforeAll?: (...args: any) => Promise<any>;
   afterAll?: (...args: any) => Promise<any>;
-}
+}
\ No newline at end of file
diff --git a/sasjs-tests/src/utils/Assert.ts b/sasjs-tests/src/utils/Assert.ts
index 9a04a7d..f762333 100644
--- a/sasjs-tests/src/utils/Assert.ts
+++ b/sasjs-tests/src/utils/Assert.ts
@@ -3,20 +3,21 @@ export const assert = (
   message = "Assertion failed"
 ) => {
   let result;
+
   try {
-    if (typeof expression === "boolean") {
-      result = expression;
-    } else {
-      result = expression();
-    }
+    if (typeof expression === "boolean") result = expression;
+    else result = expression();
   } catch (e) {
     console.error(message);
+
     throw new Error(message);
   }
+
   if (!!result) {
     return;
   } else {
     console.error(message);
+
     throw new Error(message);
   }
 };
diff --git a/sasjs-tests/src/utils/UploadFile.ts b/sasjs-tests/src/utils/UploadFile.ts
index 5dafccd..1de45ed 100644
--- a/sasjs-tests/src/utils/UploadFile.ts
+++ b/sasjs-tests/src/utils/UploadFile.ts
@@ -3,21 +3,25 @@ export const uploadFile = (file: File, fileName: string, url: string) => {
     const data = new FormData();
     data.append("file", file);
     data.append("filename", fileName);
+
     const xhr = new XMLHttpRequest();
     xhr.withCredentials = true;
-    xhr.addEventListener("readystatechange", function () {
+    xhr.addEventListener("readystatechange", function () { // TODO: use ES6
       if (this.readyState === 4) {
         let response: any;
+
         try {
           response = JSON.parse(this.responseText);
         } catch (e) {
           reject(e);
         }
+
         resolve(response);
       }
     });
+
     xhr.open("POST", url);
     xhr.setRequestHeader("cache-control", "no-cache");
     xhr.send(data);
   });
-};
+};
\ No newline at end of file
diff --git a/src/utils/splitChunks.ts b/src/utils/splitChunks.ts
index fa43fbc..6857775 100644
--- a/src/utils/splitChunks.ts
+++ b/src/utils/splitChunks.ts
@@ -1,10 +1,10 @@
-export const splitChunks = (content: string) => {
-  const size = 16000;
+export const splitChunks = (content: string) => { // TODO: set return type
+  const size = 16000; // why 16000?
 
   const numChunks = Math.ceil(content.length / size);
   const chunks = new Array(numChunks);
 
-  for (let i = 0, o = 0; i < numChunks; ++i, o += size) {
+  for (let i = 0, o = 0; i < numChunks; ++i, o += size) { // FIXME: name variables properly
     chunks[i] = content.substr(o, size);
   }