diff --git a/cmd/neofs-node/config/apiclient/config.go b/cmd/neofs-node/config/apiclient/config.go
index 4961de7d02..02d7b635aa 100644
--- a/cmd/neofs-node/config/apiclient/config.go
+++ b/cmd/neofs-node/config/apiclient/config.go
@@ -19,7 +19,7 @@ const (
 // Returns DialTimeoutDefault if value is not positive duration.
 func DialTimeout(c *config.Config) time.Duration {
 	v := config.DurationSafe(c.Sub(subsection), "dial_timeout")
-	if v != 0 {
+	if v > 0 {
 		return v
 	}
 
diff --git a/cmd/neofs-node/config/config.go b/cmd/neofs-node/config/config.go
index 080a88f6de..dd5e035933 100644
--- a/cmd/neofs-node/config/config.go
+++ b/cmd/neofs-node/config/config.go
@@ -47,7 +47,7 @@ func New(_ Prm, opts ...Option) *Config {
 
 		err := v.ReadInConfig()
 		if err != nil {
-			panic(fmt.Errorf("failed to read config: %v", err))
+			panic(fmt.Errorf("failed to read config: %w", err))
 		}
 	}
 
diff --git a/cmd/neofs-node/config/engine/shard/gc/config.go b/cmd/neofs-node/config/engine/shard/gc/config.go
index 3ff87ec6ba..341abe2818 100644
--- a/cmd/neofs-node/config/engine/shard/gc/config.go
+++ b/cmd/neofs-node/config/engine/shard/gc/config.go
@@ -15,7 +15,7 @@ const (
 	// RemoverBatchSizeDefault is a default batch size for Shard GC's remover.
 	RemoverBatchSizeDefault = 100
 
-	// RemoverSleepInterval is a default sleep interval of Shard GC's remover.
+	// RemoverSleepIntervalDefault is a default sleep interval of Shard GC's remover.
 	RemoverSleepIntervalDefault = time.Minute
 )
 
diff --git a/cmd/neofs-node/config/logger/config.go b/cmd/neofs-node/config/logger/config.go
index e443020ed1..156a50770f 100644
--- a/cmd/neofs-node/config/logger/config.go
+++ b/cmd/neofs-node/config/logger/config.go
@@ -6,7 +6,7 @@ import (
 
 // config defaults
 const (
-	// LevelDefault is a default logger level
+	// LevelDefault is a default logger level.
 	LevelDefault = "info"
 )
 
diff --git a/cmd/neofs-node/config/mainchain/config.go b/cmd/neofs-node/config/mainchain/config.go
index 3fa38d82bf..b11d38a472 100644
--- a/cmd/neofs-node/config/mainchain/config.go
+++ b/cmd/neofs-node/config/mainchain/config.go
@@ -27,7 +27,7 @@ func RPCEndpoint(c *config.Config) []string {
 // Returns DialTimeoutDefault if value is not positive duration.
 func DialTimeout(c *config.Config) time.Duration {
 	v := config.DurationSafe(c.Sub(subsection), "dial_timeout")
-	if v != 0 {
+	if v > 0 {
 		return v
 	}
 
diff --git a/cmd/neofs-node/config/metrics/config.go b/cmd/neofs-node/config/metrics/config.go
index 17510ed30b..348edcb718 100644
--- a/cmd/neofs-node/config/metrics/config.go
+++ b/cmd/neofs-node/config/metrics/config.go
@@ -9,17 +9,20 @@ import (
 const (
 	subsection = "metrics"
 
+	// ShutdownTimeoutDefault is a default value for metrics HTTP service timeout.
 	ShutdownTimeoutDefault = 30 * time.Second
-	AddressDefault         = ""
+
+	// AddressDefault is a default value for metrics HTTP service endpoint.
+	AddressDefault = ""
 )
 
 // ShutdownTimeout returns value of "shutdown_timeout" config parameter
 // from "metrics" section.
 //
-// Returns ShutdownTimeoutDefault if value is not set.
+// Returns ShutdownTimeoutDefault if value is not positive duration.
 func ShutdownTimeout(c *config.Config) time.Duration {
 	v := config.DurationSafe(c.Sub(subsection), "shutdown_timeout")
-	if v != 0 {
+	if v > 0 {
 		return v
 	}
 
diff --git a/cmd/neofs-node/config/morph/config.go b/cmd/neofs-node/config/morph/config.go
index 43784e925a..b6da9eb71d 100644
--- a/cmd/neofs-node/config/morph/config.go
+++ b/cmd/neofs-node/config/morph/config.go
@@ -46,7 +46,7 @@ func NotificationEndpoint(c *config.Config) []string {
 // Returns DialTimeoutDefault if value is not positive duration.
 func DialTimeout(c *config.Config) time.Duration {
 	v := config.DurationSafe(c.Sub(subsection), "dial_timeout")
-	if v != 0 {
+	if v > 0 {
 		return v
 	}
 
diff --git a/cmd/neofs-node/config/profiler/config.go b/cmd/neofs-node/config/profiler/config.go
index 12d574bbc6..08fe65bf5a 100644
--- a/cmd/neofs-node/config/profiler/config.go
+++ b/cmd/neofs-node/config/profiler/config.go
@@ -9,17 +9,20 @@ import (
 const (
 	subsection = "profiler"
 
+	// ShutdownTimeoutDefault is a default value for profiler HTTP service timeout.
 	ShutdownTimeoutDefault = 30 * time.Second
-	AddressDefault         = ""
+
+	// AddressDefault is a default value for profiler HTTP service endpoint.
+	AddressDefault = ""
 )
 
 // ShutdownTimeout returns value of "shutdown_timeout" config parameter
 // from "profiler" section.
 //
-// Returns ShutdownTimeoutDefault if value is not set.
+// Returns ShutdownTimeoutDefault if value is not positive duration.
 func ShutdownTimeout(c *config.Config) time.Duration {
 	v := config.DurationSafe(c.Sub(subsection), "shutdown_timeout")
-	if v != 0 {
+	if v > 0 {
 		return v
 	}
 
diff --git a/cmd/neofs-node/config/test/config.go b/cmd/neofs-node/config/test/config.go
index e56f6d61ba..410ea57e87 100644
--- a/cmd/neofs-node/config/test/config.go
+++ b/cmd/neofs-node/config/test/config.go
@@ -22,6 +22,7 @@ func fromEnvFile(path string) *config.Config {
 	var p config.Prm
 
 	loadEnv(path) // github.com/joho/godotenv can do that as well
+
 	return config.New(p)
 }