diff --git a/internal/filtering/blocked.go b/internal/filtering/blocked.go
index 458ba40d..8150f309 100644
--- a/internal/filtering/blocked.go
+++ b/internal/filtering/blocked.go
@@ -22,7 +22,8 @@ var serviceRules map[string][]*rules.NetworkRule
 // serviceIDs contains service IDs sorted alphabetically.
 var serviceIDs []string
 
-// initBlockedServices initializes package-level blocked service data.
+// initBlockedServices initializes package-level blocked service data.  l must
+// not be nil.
 func initBlockedServices(ctx context.Context, l *slog.Logger) {
 	svcLen := len(blockedServices)
 	serviceIDs = make([]string, svcLen)
diff --git a/internal/filtering/filtering.go b/internal/filtering/filtering.go
index 4463a25d..41d437c3 100644
--- a/internal/filtering/filtering.go
+++ b/internal/filtering/filtering.go
@@ -1029,9 +1029,9 @@ func makeResult(matchedRules []rules.Rule, reason Reason) (res Result) {
 	}
 }
 
-// InitModule manually initializes blocked services map.
-func InitModule(l *slog.Logger) {
-	initBlockedServices(context.TODO(), l)
+// InitModule manually initializes blocked services map.  l must not be nil.
+func InitModule(ctx context.Context, l *slog.Logger) {
+	initBlockedServices(ctx, l)
 }
 
 // New creates properly initialized DNS Filter that is ready to be used.  c must
diff --git a/internal/filtering/filtering_internal_test.go b/internal/filtering/filtering_internal_test.go
index c206597a..5097755c 100644
--- a/internal/filtering/filtering_internal_test.go
+++ b/internal/filtering/filtering_internal_test.go
@@ -18,15 +18,14 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestMain(m *testing.M) {
-	testutil.DiscardLogOutput(m)
-}
-
 const (
 	sbBlocked = "wmconvirus.narod.ru"
 	pcBlocked = "pornhub.com"
 )
 
+// testLogger is the common logger for tests.
+var testLogger = slogutil.NewDiscardLogger()
+
 // Helpers.
 
 func newForTest(t testing.TB, c *Config, filters []Filter) (f *DNSFilter, setts *Settings) {
@@ -35,7 +34,7 @@ func newForTest(t testing.TB, c *Config, filters []Filter) (f *DNSFilter, setts
 		FilteringEnabled:  true,
 	}
 	if c != nil {
-		c.Logger = cmp.Or(c.Logger, slogutil.NewDiscardLogger())
+		c.Logger = cmp.Or(c.Logger, testLogger)
 		c.SafeBrowsingCacheSize = 10000
 		c.ParentalCacheSize = 10000
 		c.SafeSearchCacheSize = 1000
@@ -46,7 +45,7 @@ func newForTest(t testing.TB, c *Config, filters []Filter) (f *DNSFilter, setts
 	} else {
 		// It must not be nil.
 		c = &Config{
-			Logger: slogutil.NewDiscardLogger(),
+			Logger: testLogger,
 		}
 	}
 	f, err := New(c, filters)
@@ -57,7 +56,7 @@ func newForTest(t testing.TB, c *Config, filters []Filter) (f *DNSFilter, setts
 
 func newChecker(host string) Checker {
 	return hashprefix.New(&hashprefix.Config{
-		Logger:    slogutil.NewDiscardLogger(),
+		Logger:    testLogger,
 		CacheTime: 10,
 		CacheSize: 100000,
 		Upstream:  aghtest.NewBlockUpstream(host, true),
@@ -676,7 +675,7 @@ func TestClientSettings(t *testing.T) {
 
 func BenchmarkSafeBrowsing(b *testing.B) {
 	d, setts := newForTest(b, &Config{
-		Logger:              slogutil.NewDiscardLogger(),
+		Logger:              testLogger,
 		SafeBrowsingEnabled: true,
 		SafeBrowsingChecker: newChecker(sbBlocked),
 	}, nil)
@@ -703,7 +702,7 @@ func BenchmarkSafeBrowsing(b *testing.B) {
 
 func BenchmarkSafeBrowsing_parallel(b *testing.B) {
 	d, setts := newForTest(b, &Config{
-		Logger:              slogutil.NewDiscardLogger(),
+		Logger:              testLogger,
 		SafeBrowsingEnabled: true,
 		SafeBrowsingChecker: newChecker(sbBlocked),
 	}, nil)
diff --git a/internal/home/config.go b/internal/home/config.go
index fef3d9ad..2ec549d3 100644
--- a/internal/home/config.go
+++ b/internal/home/config.go
@@ -3,7 +3,6 @@ package home
 import (
 	"bytes"
 	"fmt"
-	"log/slog"
 	"net/netip"
 	"os"
 	"path/filepath"
@@ -519,7 +518,6 @@ var config = &configuration{
 		Name:    "AdAway Default Blocklist",
 	}},
 	Filtering: &filtering.Config{
-		Logger:             slog.Default(),
 		ProtectionEnabled:  true,
 		BlockingMode:       filtering.BlockingModeDefault,
 		BlockedResponseTTL: 10, // in seconds
diff --git a/internal/home/home.go b/internal/home/home.go
index 56de2186..d4b6322a 100644
--- a/internal/home/home.go
+++ b/internal/home/home.go
@@ -357,11 +357,11 @@ func setupDNSFilteringConf(
 	const (
 		dnsTimeout = 3 * time.Second
 
-		sbService                 = "safe browsing"
+		sbService                 = "safe_browsing"
 		defaultSafeBrowsingServer = `https://family.adguard-dns.com/dns-query`
 		sbTXTSuffix               = `sb.dns.adguard.com.`
 
-		pcService             = "parental control"
+		pcService             = "parental_control"
 		defaultParentalServer = `https://family.adguard-dns.com/dns-query`
 		pcTXTSuffix           = `pc.dns.adguard.com.`
 	)
@@ -417,7 +417,11 @@ func setupDNSFilteringConf(
 	// default.
 	if conf.SafeBrowsingBlockHost == "" {
 		host := defaultSafeBrowsingBlockHost
-		log.Info("%s: warning: empty blocking host; using default: %q", sbService, host)
+		baseLogger.WarnContext(ctx,
+			"empty blocking host; set default",
+			"service", sbService,
+			"host", host,
+		)
 
 		conf.SafeBrowsingBlockHost = host
 	}
@@ -441,7 +445,11 @@ func setupDNSFilteringConf(
 	// default.
 	if conf.ParentalBlockHost == "" {
 		host := defaultParentalBlockHost
-		log.Info("%s: warning: empty blocking host; using default: %q", pcService, host)
+		baseLogger.WarnContext(ctx,
+			"empty blocking host; set default",
+			"service", pcService,
+			"host", host,
+		)
 
 		conf.ParentalBlockHost = host
 	}
@@ -616,13 +624,13 @@ func run(opts options, clientBuildFS fs.FS, done chan struct{}, sigHdlr *signalH
 	err = configureOS(config)
 	fatalOnError(err)
 
+	// TODO(s.chzhen):  Use it for the entire initialization process.
+	ctx := context.Background()
+
 	// Clients package uses filtering package's static data
 	// (filtering.BlockedSvcKnown()), so we have to initialize filtering static
 	// data first, but also to avoid relying on automatic Go init() function.
-	filtering.InitModule(slogLogger)
-
-	// TODO(s.chzhen):  Use it for the entire initialization process.
-	ctx := context.Background()
+	filtering.InitModule(ctx, slogLogger)
 
 	err = initContextClients(ctx, slogLogger, sigHdlr)
 	fatalOnError(err)