diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a7c6a24..51cf6924 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@
 	PLACEHOLDER for the next version:
 	## **WORK IN PROGRESS**
 -->
+## **WORK IN PROGRESS**
+* (@Apollon77/@copilot) Logs npm and installation errors to console for easier debugging
+
 ## 5.1.1 (2025-08-31)
 * (@Apollon77) Downgrades chai-as-promised type dependency to same major as main dependency
 
diff --git a/build/tests/integration/lib/adapterSetup.js b/build/tests/integration/lib/adapterSetup.js
index 0744efdd..26b51e50 100644
--- a/build/tests/integration/lib/adapterSetup.js
+++ b/build/tests/integration/lib/adapterSetup.js
@@ -75,9 +75,13 @@ class AdapterSetup {
         // Therefore pack it into a tarball and put it in the test dir for installation
         const packResult = await (0, executeCommand_1.executeCommand)('npm', ['pack', '--loglevel', 'silent'], {
             stdout: 'pipe',
+            stderr: 'pipe',
         });
         if (packResult.exitCode !== 0 || typeof packResult.stdout !== 'string') {
-            throw new Error(`Packing the adapter tarball failed!`);
+            const errorMessage = packResult.stderr
+                ? `Packing the adapter tarball failed!\nstderr: ${packResult.stderr}`
+                : `Packing the adapter tarball failed!`;
+            throw new Error(errorMessage);
         }
         // The last non-empty line of `npm pack`s STDOUT contains the tarball path
         const stdoutLines = packResult.stdout.trim().split(/[\r\n]+/);
@@ -92,6 +96,7 @@ class AdapterSetup {
         debug('Removing the adapter from package-lock.json');
         await (0, executeCommand_1.executeCommand)('npm', ['uninstall', this.adapterFullName, '--package-lock-only', '--omit=dev'], {
             cwd: this.testDir,
+            stderr: 'pipe',
         });
         // Complete the package.json, so npm can do it's magic
         debug('Saving the adapter in package.json');
@@ -114,6 +119,7 @@ class AdapterSetup {
         // Defer to npm to install the controller (if it wasn't already)
         await (0, executeCommand_1.executeCommand)('npm', ['i', '--omit=dev'], {
             cwd: this.testDir,
+            stderr: 'pipe',
         });
         debug('  => done!');
     }
@@ -126,9 +132,13 @@ class AdapterSetup {
         const addResult = await (0, executeCommand_1.executeCommand)('node', [`${this.appName}.js`, 'add', this.adapterName, '--enabled', 'false'], {
             cwd: this.testControllerDir,
             stdout: 'ignore',
+            stderr: 'pipe',
         });
         if (addResult.exitCode !== 0) {
-            throw new Error(`Adding the adapter instance failed!`);
+            const errorMessage = addResult.stderr
+                ? `Adding the adapter instance failed!\nstderr: ${addResult.stderr}`
+                : `Adding the adapter instance failed!`;
+            throw new Error(errorMessage);
         }
         debug('  => done!');
     }
diff --git a/build/tests/integration/lib/controllerSetup.js b/build/tests/integration/lib/controllerSetup.js
index 005ea945..c9aa08ce 100644
--- a/build/tests/integration/lib/controllerSetup.js
+++ b/build/tests/integration/lib/controllerSetup.js
@@ -102,6 +102,7 @@ class ControllerSetup {
         debug('(Re-)installing JS Controller...');
         await (0, executeCommand_1.executeCommand)('npm', ['i', '--omit=dev'], {
             cwd: this.testDir,
+            stderr: 'pipe',
         });
         // Prepare/clean the databases and config
         if (wasJsControllerInstalled) {
@@ -182,13 +183,18 @@ class ControllerSetup {
         await (0, executeCommand_1.executeCommand)('node', [`${this.appName}.js`, 'stop'], {
             cwd: this.testControllerDir,
             stdout: 'ignore',
+            stderr: 'pipe',
         });
         const setupResult = await (0, executeCommand_1.executeCommand)('node', [`${this.appName}.js`, 'setup', 'first', '--console'], {
             cwd: this.testControllerDir,
             stdout: 'ignore',
+            stderr: 'pipe',
         });
         if (setupResult.exitCode !== 0) {
-            throw new Error(`${this.appName} setup first failed!`);
+            const errorMessage = setupResult.stderr
+                ? `${this.appName} setup first failed!\nstderr: ${setupResult.stderr}`
+                : `${this.appName} setup first failed!`;
+            throw new Error(errorMessage);
         }
         debug('  => done!');
     }
diff --git a/src/tests/integration/lib/adapterSetup.ts b/src/tests/integration/lib/adapterSetup.ts
index 86cb2d76..1d1b2261 100644
--- a/src/tests/integration/lib/adapterSetup.ts
+++ b/src/tests/integration/lib/adapterSetup.ts
@@ -50,9 +50,13 @@ export class AdapterSetup {
         // Therefore pack it into a tarball and put it in the test dir for installation
         const packResult = await executeCommand('npm', ['pack', '--loglevel', 'silent'], {
             stdout: 'pipe',
+            stderr: 'pipe',
         });
         if (packResult.exitCode !== 0 || typeof packResult.stdout !== 'string') {
-            throw new Error(`Packing the adapter tarball failed!`);
+            const errorMessage = packResult.stderr
+                ? `Packing the adapter tarball failed!\nstderr: ${packResult.stderr}`
+                : `Packing the adapter tarball failed!`;
+            throw new Error(errorMessage);
         }
 
         // The last non-empty line of `npm pack`s STDOUT contains the tarball path
@@ -69,6 +73,7 @@ export class AdapterSetup {
         debug('Removing the adapter from package-lock.json');
         await executeCommand('npm', ['uninstall', this.adapterFullName, '--package-lock-only', '--omit=dev'], {
             cwd: this.testDir,
+            stderr: 'pipe',
         });
 
         // Complete the package.json, so npm can do it's magic
@@ -94,6 +99,7 @@ export class AdapterSetup {
         // Defer to npm to install the controller (if it wasn't already)
         await executeCommand('npm', ['i', '--omit=dev'], {
             cwd: this.testDir,
+            stderr: 'pipe',
         });
 
         debug('  => done!');
@@ -112,10 +118,14 @@ export class AdapterSetup {
             {
                 cwd: this.testControllerDir,
                 stdout: 'ignore',
+                stderr: 'pipe',
             },
         );
         if (addResult.exitCode !== 0) {
-            throw new Error(`Adding the adapter instance failed!`);
+            const errorMessage = addResult.stderr
+                ? `Adding the adapter instance failed!\nstderr: ${addResult.stderr}`
+                : `Adding the adapter instance failed!`;
+            throw new Error(errorMessage);
         }
         debug('  => done!');
     }
diff --git a/src/tests/integration/lib/controllerSetup.ts b/src/tests/integration/lib/controllerSetup.ts
index 0848faba..94c2fa67 100644
--- a/src/tests/integration/lib/controllerSetup.ts
+++ b/src/tests/integration/lib/controllerSetup.ts
@@ -80,6 +80,7 @@ export class ControllerSetup {
         debug('(Re-)installing JS Controller...');
         await executeCommand('npm', ['i', '--omit=dev'], {
             cwd: this.testDir,
+            stderr: 'pipe',
         });
         // Prepare/clean the databases and config
         if (wasJsControllerInstalled) {
@@ -167,14 +168,19 @@ export class ControllerSetup {
         await executeCommand('node', [`${this.appName}.js`, 'stop'], {
             cwd: this.testControllerDir,
             stdout: 'ignore',
+            stderr: 'pipe',
         });
 
         const setupResult = await executeCommand('node', [`${this.appName}.js`, 'setup', 'first', '--console'], {
             cwd: this.testControllerDir,
             stdout: 'ignore',
+            stderr: 'pipe',
         });
         if (setupResult.exitCode !== 0) {
-            throw new Error(`${this.appName} setup first failed!`);
+            const errorMessage = setupResult.stderr
+                ? `${this.appName} setup first failed!\nstderr: ${setupResult.stderr}`
+                : `${this.appName} setup first failed!`;
+            throw new Error(errorMessage);
         }
         debug('  => done!');
     }