diff --git a/selfupdate/log_test.go b/selfupdate/log_test.go
index 91dd600..59f37b4 100644
--- a/selfupdate/log_test.go
+++ b/selfupdate/log_test.go
@@ -5,7 +5,7 @@ import (
 )
 
 func TestEnableDisableLog(t *testing.T) {
-	defer EnableLog()
+	defer DisableLog()
 
 	EnableLog()
 	if !logEnabled {
diff --git a/selfupdate/uncompress.go b/selfupdate/uncompress.go
index fca4616..e672e2f 100644
--- a/selfupdate/uncompress.go
+++ b/selfupdate/uncompress.go
@@ -14,6 +14,8 @@ import (
 
 func uncompress(src io.Reader, url, cmd string) (io.Reader, error) {
 	if strings.HasSuffix(url, ".zip") {
+		log.Println("Uncompressing zip file", url)
+
 		// Zip format requires its file size for uncompressing.
 		// So we need to read the HTTP response into a buffer at first.
 		buf, err := ioutil.ReadAll(src)
@@ -36,6 +38,8 @@ func uncompress(src io.Reader, url, cmd string) (io.Reader, error) {
 
 		return nil, fmt.Errorf("File '%s' for the command is not found in %s", cmd, url)
 	} else if strings.HasSuffix(url, ".tar.gz") {
+		log.Println("Uncompressing tar.gz file", url)
+
 		gz, err := gzip.NewReader(src)
 		if err != nil {
 			return nil, fmt.Errorf("Failed to uncompress .tar.gz file: %s", err)
@@ -58,6 +62,8 @@ func uncompress(src io.Reader, url, cmd string) (io.Reader, error) {
 
 		return nil, fmt.Errorf("File '%s' for the command is not found in %s", cmd, url)
 	} else if strings.HasSuffix(url, ".gzip") || strings.HasSuffix(url, ".gz") {
+		log.Println("Uncompressing gzip file", url)
+
 		r, err := gzip.NewReader(src)
 		if err != nil {
 			return nil, fmt.Errorf("Failed to uncompress gzip file downloaded from %s: %s", url, err)
@@ -71,5 +77,6 @@ func uncompress(src io.Reader, url, cmd string) (io.Reader, error) {
 		return r, nil
 	}
 
+	log.Println("Uncompression is not needed", url)
 	return src, nil
 }
diff --git a/selfupdate/update.go b/selfupdate/update.go
index 77a3612..d418e52 100644
--- a/selfupdate/update.go
+++ b/selfupdate/update.go
@@ -27,6 +27,7 @@ func UpdateTo(assetURL, cmdPath string) error {
 		return err
 	}
 
+	log.Println("Will update", cmdPath, "to the latest downloaded from", assetURL)
 	return update.Apply(asset, update.Options{
 		TargetPath: cmdPath,
 	})
@@ -40,11 +41,14 @@ func UpdateCommand(cmdPath string, current semver.Version, slug string) (*Releas
 		return nil, err
 	}
 	if !ok {
+		log.Println("No release detected. Current version is considered up-to-date")
 		return &Release{Version: current}, nil
 	}
 	if current.Equals(rel.Version) {
+		log.Println("Current version", current, "is the latest. Update is not needed")
 		return rel, nil
 	}
+	log.Println("Will update", cmdPath, "to the latest version", rel.Version)
 	if err := UpdateTo(rel.AssetURL, cmdPath); err != nil {
 		return nil, err
 	}