diff --git a/Makefile b/Makefile
index b6ba009a6..5d020de7a 100644
--- a/Makefile
+++ b/Makefile
@@ -323,15 +323,7 @@ install-golint:
 
 errcheck: install-errcheck
 	errcheck -exclude=errcheck_excludes.txt ./lib/...
-	errcheck -exclude=errcheck_excludes.txt ./app/vminsert/...
-	errcheck -exclude=errcheck_excludes.txt ./app/vmselect/...
-	errcheck -exclude=errcheck_excludes.txt ./app/vmstorage/...
-	errcheck -exclude=errcheck_excludes.txt ./app/vmagent/...
-	errcheck -exclude=errcheck_excludes.txt ./app/vmalert/...
-	errcheck -exclude=errcheck_excludes.txt ./app/vmauth/...
-	errcheck -exclude=errcheck_excludes.txt ./app/vmbackup/...
-	errcheck -exclude=errcheck_excludes.txt ./app/vmrestore/...
-	errcheck -exclude=errcheck_excludes.txt ./app/vmctl/...
+	errcheck -exclude=errcheck_excludes.txt ./app/...
 
 install-errcheck:
 	which errcheck || go install github.com/kisielk/errcheck@latest
diff --git a/app/victoria-metrics/main_test.go b/app/victoria-metrics/main_test.go
index 805a5567a..d5f27b0a4 100644
--- a/app/victoria-metrics/main_test.go
+++ b/app/victoria-metrics/main_test.go
@@ -138,7 +138,7 @@ func setUp() {
 		if err != nil {
 			return false
 		}
-		resp.Body.Close()
+		_ = resp.Body.Close()
 		return resp.StatusCode == 200
 	}
 	if err := waitFor(testStorageInitTimeout, readyStorageCheckFunc); err != nil {
@@ -337,7 +337,9 @@ func tcpWrite(t *testing.T, address string, data string) {
 	s := newSuite(t)
 	conn, err := net.Dial("tcp", address)
 	s.noError(err)
-	defer conn.Close()
+	defer func() {
+		_ = conn.Close()
+	}()
 	n, err := conn.Write([]byte(data))
 	s.noError(err)
 	s.equalInt(n, len(data))
@@ -348,7 +350,9 @@ func httpReadMetrics(t *testing.T, address, query string) []Metric {
 	s := newSuite(t)
 	resp, err := http.Get(address + query)
 	s.noError(err)
-	defer resp.Body.Close()
+	defer func() {
+		_ = resp.Body.Close()
+	}()
 	s.equalInt(resp.StatusCode, 200)
 	var rows []Metric
 	for dec := json.NewDecoder(resp.Body); dec.More(); {
@@ -363,7 +367,9 @@ func httpReadStruct(t *testing.T, address, query string, dst interface{}) {
 	s := newSuite(t)
 	resp, err := http.Get(address + query)
 	s.noError(err)
-	defer resp.Body.Close()
+	defer func() {
+		_ = resp.Body.Close()
+	}()
 	s.equalInt(resp.StatusCode, 200)
 	s.noError(json.NewDecoder(resp.Body).Decode(dst))
 }
diff --git a/app/victoria-metrics/self_scraper.go b/app/victoria-metrics/self_scraper.go
index fb544a009..e8540eddd 100644
--- a/app/victoria-metrics/self_scraper.go
+++ b/app/victoria-metrics/self_scraper.go
@@ -85,7 +85,9 @@ func selfScraper(scrapeInterval time.Duration) {
 			mr.Timestamp = currentTimestamp
 			mr.Value = r.Value
 		}
-		vmstorage.AddRows(mrs)
+		if err := vmstorage.AddRows(mrs); err != nil {
+			logger.Errorf("cannot store self-scraped metrics: %s", err)
+		}
 	}
 }