diff --git a/testscript/cmd.go b/testscript/cmd.go
index e04d26e..b694311 100644
--- a/testscript/cmd.go
+++ b/testscript/cmd.go
@@ -578,6 +578,7 @@ func (ts *TestScript) waitBackgroundOne(bgName string) {
 	}
 	// Note: ignore bg.neg, which only takes effect on the non-specific
 	// wait command.
+	println(ts.file, bg.cmd.ProcessState.Success(), bg.cmd.ProcessState.Exited(), bg.cmd.ProcessState.ExitCode())
 	if bg.cmd.ProcessState.Success() {
 		if bg.neg {
 			ts.Fatalf("unexpected command success")
@@ -634,6 +635,7 @@ func (ts *TestScript) waitBackground(checkStatus bool) {
 		if !checkStatus {
 			continue
 		}
+		println(ts.file, bg.cmd.ProcessState.Success(), bg.cmd.ProcessState.Exited(), bg.cmd.ProcessState.ExitCode())
 		if bg.cmd.ProcessState.Success() {
 			if bg.neg {
 				ts.Fatalf("unexpected command success")
diff --git a/testscript/testdata/interrupt_implicit.txt b/testscript/testdata/interrupt_implicit.txt
new file mode 100644
index 0000000..6ea1c39
--- /dev/null
+++ b/testscript/testdata/interrupt_implicit.txt
@@ -0,0 +1,4 @@
+# Let testscript stop signalcatcher at the end of the testscript.
+
+signalcatcher &
+waitfile catchsignal
diff --git a/testscript/testscript.go b/testscript/testscript.go
index 3fe5189..1e671d9 100644
--- a/testscript/testscript.go
+++ b/testscript/testscript.go
@@ -651,7 +651,12 @@ func (ts *TestScript) run() {
 	for _, bg := range ts.background {
 		interruptProcess(bg.cmd.Process)
 	}
-	ts.cmdWait(false, nil)
+	func() {
+		defer catchFailNow(func() {
+			failed = true
+		})
+		ts.cmdWait(false, nil)
+	}()
 
 	// If we reached here but we've failed (probably because ContinueOnError
 	// was set), don't wipe the log and print "PASS".