diff --git a/Makefile b/Makefile
index 113348d..73d1c0c 100644
--- a/Makefile
+++ b/Makefile
@@ -7,5 +7,11 @@ test:
 	which gotestsum || go install gotest.tools/gotestsum@latest
 	gotestsum --format "testname" -- -tags="timetzdata sqlite_fts5 sqlite_foreign_keys" "./..."
 
+test-in-docker:
+	tag="goext_temp_test_image:$(shell uuidgen | tr -d '-')";        \
+	docker build --tag $$tag . -f .gitea/workflows/Dockerfile_tests; \
+	docker run --rm $$tag;                                           \
+	docker rmi $$tag
+
 version:
 	_data/version.sh
\ No newline at end of file
diff --git a/cmdext/cmdrunner.go b/cmdext/cmdrunner.go
index 7007b4b..c989a46 100644
--- a/cmdext/cmdrunner.go
+++ b/cmdext/cmdrunner.go
@@ -133,9 +133,6 @@ func run(opt CommandRunner) (CommandResult, error) {
 
 	case <-stderrFailChan:
 		_ = cmd.Process.Kill()
-		for _, lstr := range opt.listener {
-			lstr.Timeout()
-		}
 
 		if fallback, ok := syncext.ReadChannelWithTimeout(outputChan, 32*time.Millisecond); ok {
 			// most of the time the cmd.Process.Kill() should also have finished the pipereader
@@ -160,7 +157,8 @@ func run(opt CommandRunner) (CommandResult, error) {
 		}
 
 	case outobj := <-outputChan:
-		if exiterr, ok := outobj.err.(*exec.ExitError); ok {
+		var exiterr *exec.ExitError
+		if errors.As(outobj.err, &exiterr) {
 			excode := exiterr.ExitCode()
 			for _, lstr := range opt.listener {
 				lstr.Finished(excode)
diff --git a/cmdext/pipereader.go b/cmdext/pipereader.go
index 4812eff..eb6d706 100644
--- a/cmdext/pipereader.go
+++ b/cmdext/pipereader.go
@@ -32,8 +32,8 @@ func (pr *pipeReader) Read(listener []CommandListener) (string, string, string,
 	stdout := ""
 	go func() {
 		buf := make([]byte, 128)
-		for true {
-			n, out := pr.stdout.Read(buf)
+		for {
+			n, err := pr.stdout.Read(buf)
 			if n > 0 {
 				txt := string(buf[:n])
 				stdout += txt
@@ -42,11 +42,11 @@ func (pr *pipeReader) Read(listener []CommandListener) (string, string, string,
 					lstr.ReadRawStdout(buf[:n])
 				}
 			}
-			if out == io.EOF {
+			if err == io.EOF {
 				break
 			}
-			if out != nil {
-				errch <- out
+			if err != nil {
+				errch <- err
 				break
 			}
 		}
@@ -61,7 +61,7 @@ func (pr *pipeReader) Read(listener []CommandListener) (string, string, string,
 	stderr := ""
 	go func() {
 		buf := make([]byte, 128)
-		for true {
+		for {
 			n, err := pr.stderr.Read(buf)
 
 			if n > 0 {
diff --git a/goextVersion.go b/goextVersion.go
index 6ff4f15..d475aae 100644
--- a/goextVersion.go
+++ b/goextVersion.go
@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.270"
+const GoextVersion = "0.0.271"
 
-const GoextVersionTimestamp = "2023-09-25T11:35:03+0200"
+const GoextVersionTimestamp = "2023-09-26T14:32:45+0200"
diff --git a/syncext/atomic.go b/syncext/atomic.go
index e9228f2..9c482ec 100644
--- a/syncext/atomic.go
+++ b/syncext/atomic.go
@@ -27,10 +27,12 @@ func (a *AtomicBool) Get() bool {
 	return a.v
 }
 
-func (a *AtomicBool) Set(value bool) {
+func (a *AtomicBool) Set(value bool) bool {
 	a.lock.Lock()
 	defer a.lock.Unlock()
 
+	oldValue := a.v
+
 	a.v = value
 
 	for k, v := range a.listener {
@@ -42,6 +44,8 @@ func (a *AtomicBool) Set(value bool) {
 			delete(a.listener, k)
 		}
 	}
+
+	return oldValue
 }
 
 func (a *AtomicBool) Wait(waitFor bool) {