diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a1d614e..8321aed 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -26,6 +26,7 @@ mirror:
 snyk:
   stage: security
   script:
+    - npmci npm prepare
     - npmci command npm install -g snyk
     - npmci command npm install --ignore-scripts
     - npmci command snyk test
@@ -36,21 +37,11 @@ snyk:
 # ====================
 # test stage
 # ====================
-testLEGACY:
-  stage: test
-  script:
-  - npmci node install legacy
-  - npmci npm install
-  - npmci npm test
-  coverage: /\d+.?\d+?\%\s*coverage/
-  tags:
-  - docker
-  - notpriv
-  allow_failure: true
 
 testLTS:
   stage: test
   script:
+  - npmci npm prepare
   - npmci node install lts
   - npmci npm install
   - npmci npm test
@@ -62,6 +53,7 @@ testLTS:
 testSTABLE:
   stage: test
   script:
+  - npmci npm prepare
   - npmci node install stable
   - npmci npm install
   - npmci npm test
@@ -118,6 +110,7 @@ pages:
   stage: metadata
   script:
     - npmci command npm install -g typedoc typescript
+    - npmci npm prepare
     - npmci npm install
     - npmci command typedoc --module "commonjs" --target "ES2016" --out public/ ts/
   tags:
@@ -130,13 +123,3 @@ pages:
     paths:
     - public
   allow_failure: true
-
-windowsCompatibility:
-  image: stefanscherer/node-windows:10-build-tools
-  stage: metadata
-  script:
-  - npm install & npm test
-  coverage: /\d+.?\d+?\%\s*coverage/
-  tags:
-  - windows
-  allow_failure: true
diff --git a/package.json b/package.json
index 1876a22..6902442 100644
--- a/package.json
+++ b/package.json
@@ -32,4 +32,4 @@
     "@types/figures": "^2.0.0",
     "figures": "^2.0.0"
   }
-}
+}
\ No newline at end of file
diff --git a/ts/tstest.classes.tap.combinator.ts b/ts/tstest.classes.tap.combinator.ts
index f62c07f..f45ab7c 100644
--- a/ts/tstest.classes.tap.combinator.ts
+++ b/ts/tstest.classes.tap.combinator.ts
@@ -14,7 +14,9 @@ export class TapCombinator {
   }
 
   evaluate() {
-    console.log(`${logPrefixes.TsTestPrefix} RESULTS FOR ${this.tapParserStore.length} TESTFILE(S):`);
+    console.log(
+      `${logPrefixes.TsTestPrefix} RESULTS FOR ${this.tapParserStore.length} TESTFILE(S):`
+    );
 
     let failGlobal = false; // determine wether tstest should fail
     for (const tapParser of this.tapParserStore) {
diff --git a/ts/tstest.classes.tap.parser.ts b/ts/tstest.classes.tap.parser.ts
index 596cb19..a24fa05 100644
--- a/ts/tstest.classes.tap.parser.ts
+++ b/ts/tstest.classes.tap.parser.ts
@@ -23,7 +23,6 @@ export class TapParser {
    */
   constructor(public fileName: string) {}
 
-
   private _getNewTapTestResult() {
     this.activeTapTestResult = new TapTestResult(this.testStore.length + 1);
   }
@@ -45,10 +44,7 @@ export class TapParser {
         const regexResult = this.expectedTestsRegex.exec(logLine);
         this.expectedTests = parseInt(regexResult[2]);
         console.log(
-          `${logPrefixes.TapPrefix} ${cs(
-            `Expecting ${this.expectedTests} tests!`,
-            'blue'
-          )}`
+          `${logPrefixes.TapPrefix} ${cs(`Expecting ${this.expectedTests} tests!`, 'blue')}`
         );
 
         // initiating first TapResult
@@ -70,9 +66,7 @@ export class TapParser {
         // test for protocol error
         if (testId !== this.activeTapTestResult.id) {
           console.log(
-            `${
-              logPrefixes.TapErrorPrefix
-            } Something is strange! Test Ids are not equal!`
+            `${logPrefixes.TapErrorPrefix} Something is strange! Test Ids are not equal!`
           );
         }
         this.activeTapTestResult.setTestResult(testOk);
@@ -128,9 +122,9 @@ export class TapParser {
    * returns a test overview as string
    */
   getTestOverviewAsString() {
-    let overviewString = ''
-    for(let test of this.testStore) {
-      if(overviewString !== '') {
+    let overviewString = '';
+    for (let test of this.testStore) {
+      if (overviewString !== '') {
         overviewString += ' | ';
       }
       if (test.testOk) {
@@ -161,29 +155,20 @@ export class TapParser {
       if (this.expectedTests === this.receivedTests) {
         console.log(
           `${logPrefixes.TapPrefix} ${cs(
-            `${this.receivedTests} out of ${
-              this.expectedTests
-            } Tests completed!`,
+            `${this.receivedTests} out of ${this.expectedTests} Tests completed!`,
             'green'
           )}`
         );
       } else {
         console.log(
           `${logPrefixes.TapErrorPrefix} ${cs(
-            `Only ${this.receivedTests} out of ${
-              this.expectedTests
-            } completed!`,
+            `Only ${this.receivedTests} out of ${this.expectedTests} completed!`,
             'red'
           )}`
         );
       }
       if (this.getErrorTests().length === 0) {
-        console.log(
-          `${logPrefixes.TapPrefix} ${cs(
-            `All tests are successfull!!!`,
-            'green'
-          )}`
-        );
+        console.log(`${logPrefixes.TapPrefix} ${cs(`All tests are successfull!!!`, 'green')}`);
       } else {
         console.log(
           `${logPrefixes.TapPrefix} ${cs(
diff --git a/ts/tstest.classes.tstest.ts b/ts/tstest.classes.tstest.ts
index d92de40..ae37be8 100644
--- a/ts/tstest.classes.tstest.ts
+++ b/ts/tstest.classes.tstest.ts
@@ -37,12 +37,14 @@ export class TsTest {
       const tapParser = new TapParser(fileName);
 
       // tsrun options
-      let tsrunOptions = ''
-      if(process.argv.includes('--web')) {
-        tsrunOptions += ' --web'
+      let tsrunOptions = '';
+      if (process.argv.includes('--web')) {
+        tsrunOptions += ' --web';
       }
 
-      const execResultStreaming = await smartshellInstance.execStreamingSilent(`tsrun ${fileName}${tsrunOptions}`);
+      const execResultStreaming = await smartshellInstance.execStreamingSilent(
+        `tsrun ${fileName}${tsrunOptions}`
+      );
       await tapParser.handleTapProcess(execResultStreaming.childProcess);
       console.log(cs(`^`.repeat(16), 'cyan'));
       console.log(''); // force new line
diff --git a/tslint.json b/tslint.json
index 45052ad..d4ea2e9 100644
--- a/tslint.json
+++ b/tslint.json
@@ -1,3 +1,17 @@
 {
-    "extends": "tslint-config-standard"
+  "extends": ["tslint:latest", "tslint-config-prettier"],
+  "rules": {
+    "semicolon": [true, "always"],
+    "no-console": false,
+    "ordered-imports": false,
+    "object-literal-sort-keys": false,
+    "member-ordering": {
+      "options":{
+        "order": [
+          "static-method"
+        ]
+      }
+    }
+  },
+  "defaultSeverity": "warning"
 }