diff --git a/cmd/sslcert/main.go b/cmd/sslcert/main.go
index efb4971..be9c921 100644
--- a/cmd/sslcert/main.go
+++ b/cmd/sslcert/main.go
@@ -215,9 +215,9 @@ func NewProgram() program.Program {
 	return program
 }
 
-// Terminate the monitoring check program.
-func (program *checkProgram) Done() {
-	program.plugin.Done()
+// Return the program's output value.
+func (program *checkProgram) Output() *plugin.Plugin {
+	return program.plugin
 }
 
 // Check the values that were specified from the command line. Returns true
diff --git a/cmd/zoneserial/main.go b/cmd/zoneserial/main.go
index e8bc7d6..69bd27d 100644
--- a/cmd/zoneserial/main.go
+++ b/cmd/zoneserial/main.go
@@ -85,13 +85,9 @@ func NewProgram() program.Program {
 	return program
 }
 
-// Terminate the monitoring check program.
-func (program *checkProgram) Done() {
-	if r := recover(); r != nil {
-		program.plugin.SetState(plugin.StatusUnknown, "Internal error")
-		program.plugin.AddLinef("Error info: %v", r)
-	}
-	program.plugin.Done()
+// Return the program's output value.
+func (program *checkProgram) Output() *plugin.Plugin {
+	return program.plugin
 }
 
 // Check the values that were specified from the command line. Returns true if the arguments made sense.
diff --git a/main.go b/main.go
index e8ce79a..af989b1 100644
--- a/main.go
+++ b/main.go
@@ -7,6 +7,7 @@ import (
 
 	"nocternity.net/gomonop/cmd/sslcert"
 	"nocternity.net/gomonop/cmd/zoneserial"
+	"nocternity.net/gomonop/pkg/plugin"
 	"nocternity.net/gomonop/pkg/program"
 	"nocternity.net/gomonop/pkg/version"
 )
@@ -55,7 +56,17 @@ func getProgram() program.Program {
 
 func main() {
 	program := getProgram()
-	defer program.Done()
+
+	output := program.Output()
+	defer func() {
+		if r := recover(); r != nil {
+			output.SetState(plugin.StatusUnknown, "Internal error")
+			output.AddLinef("Error info: %v", r)
+		}
+		fmt.Println(output.String())
+		os.Exit(output.ExitCode())
+	}()
+
 	if program.CheckArguments() {
 		program.RunCheck()
 	}
diff --git a/pkg/plugin/plugin.go b/pkg/plugin/plugin.go
index 061b06f..b967e9f 100644
--- a/pkg/plugin/plugin.go
+++ b/pkg/plugin/plugin.go
@@ -5,7 +5,6 @@ package plugin // import nocternity.net/gomonop/pkg/perfdata
 import (
 	"container/list"
 	"fmt"
-	"os"
 	"strings"
 
 	"nocternity.net/gomonop/pkg/perfdata"
@@ -70,10 +69,9 @@ func (p *Plugin) AddPerfData(pd *perfdata.PerfData) {
 	p.perfData[pd.Label] = pd
 }
 
-// Done generates the plugin's text output from its name, status, text data
-// and performance data, before exiting with the code corresponding to the
-// status.
-func (p *Plugin) Done() {
+// String generates the plugin's text output from its name, status, text data
+// and performance data.
+func (p *Plugin) String() string {
 	var strBuilder strings.Builder
 	strBuilder.WriteString(p.name)
 	strBuilder.WriteString(" ")
@@ -99,6 +97,10 @@ func (p *Plugin) Done() {
 			strBuilder.WriteString(em.Value.(string))
 		}
 	}
-	fmt.Println(strBuilder.String())
-	os.Exit(int(p.status))
+	return strBuilder.String()
+}
+
+// ExitCode returns the plugin's exit code.
+func (p *Plugin) ExitCode() int {
+	return int(p.status)
 }
diff --git a/pkg/program/program.go b/pkg/program/program.go
index d8b3510..2d5a1dd 100644
--- a/pkg/program/program.go
+++ b/pkg/program/program.go
@@ -1,9 +1,11 @@
 package program // import nocternity.net/gomonop/pkg/program
 
+import "nocternity.net/gomonop/pkg/plugin"
+
 type Program interface {
+	Output() *plugin.Plugin
 	CheckArguments() bool
 	RunCheck()
-	Done()
 }
 
 type Builder func() Program