diff --git a/.gitignore b/.gitignore
index 21e8bca..1439928 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@ themes/default/templates/raw.html.ep
 themes/default/templates/stats.json.ep
 tmp/*
 .zanata-cache/*
+cover_db/*
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f08e3fc..8bedcd6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -66,11 +66,11 @@ carton:
 carton_sqlite:
   <<: *carton_bdd_definition
   script:
-    - carton install --deployment --without=postgresql --without=minion --without=cache
+    - carton install --deployment --without=postgresql --without=minion --without=cache --without=test
 carton_postgresql:
   <<: *carton_bdd_definition
   script:
-    - carton install --deployment --without=sqlite --without=minion --without=cache
+    - carton install --deployment --without=sqlite --without=minion --without=cache --without=test
 
 ### SQLite tests
 ##
@@ -78,16 +78,17 @@ carton_postgresql:
 sqlite1:
   <<: *sqlite_definition
   script:
-    - carton install --deployment --without=postgresql --without=minion --without=cache
+    - carton install --deployment --without=postgresql --without=minion --without=cache --without=test
     - MOJO_CONFIG=t/sqlite1.conf make test-sqlite
     - MOJO_CONFIG=t/sqlite1.conf make watch
     - MOJO_CONFIG=t/sqlite1.conf make cleanbdd
     - MOJO_CONFIG=t/sqlite1.conf make cleanfiles
     - MOJO_CONFIG=t/sqlite1.conf make stats
+    - MOJO_CONFIG=t/sqlite1.conf make cover
 sqlite2:
   <<: *sqlite_definition
   script:
-    - carton install --deployment --without=postgresql --without=cache
+    - carton install --deployment --without=postgresql --without=cache --without=test
     - MOJO_CONFIG=t/sqlite2.conf make minion &
     - sleep 3
     - MOJO_CONFIG=t/sqlite2.conf make test-sqlite
@@ -95,13 +96,14 @@ sqlite2:
     - MOJO_CONFIG=t/sqlite2.conf make cleanbdd
     - MOJO_CONFIG=t/sqlite2.conf make cleanfiles
     - MOJO_CONFIG=t/sqlite2.conf make stats
+    - MOJO_CONFIG=t/sqlite2.conf make cover
 sqlite3:
   <<: *sqlite_definition
   services:
     - name: postgres:9.6
       alias: postgres
   script:
-    - carton install --deployment --without=cache
+    - carton install --deployment --without=cache --without=test
     - export PGPASSWORD=lutim_pwd; echo 'CREATE DATABASE lutim_minion WITH OWNER lutim;' | psql -h postgres -U lutim lutim_db
     - MOJO_CONFIG=t/sqlite3.conf make minion &
     - sleep 3
@@ -110,6 +112,7 @@ sqlite3:
     - MOJO_CONFIG=t/sqlite3.conf make cleanbdd
     - MOJO_CONFIG=t/sqlite3.conf make cleanfiles
     - MOJO_CONFIG=t/sqlite3.conf make stats
+    - MOJO_CONFIG=t/sqlite3.conf make cover
 
 ### PostgreSQL tests
 ##
@@ -117,16 +120,17 @@ sqlite3:
 postgresql1:
   <<: *pg_definition
   script:
-    - carton install --deployment --without=sqlite --without=minion --without=cache
+    - carton install --deployment --without=sqlite --without=minion --without=cache --without=test
     - MOJO_CONFIG=t/postgresql1.conf make test-pg
     - MOJO_CONFIG=t/postgresql1.conf make watch
     - MOJO_CONFIG=t/postgresql1.conf make cleanbdd
     - MOJO_CONFIG=t/postgresql1.conf make cleanfiles
     - MOJO_CONFIG=t/postgresql1.conf make stats
+    - MOJO_CONFIG=t/postgresql1.conf make cover
 postgresql2:
   <<: *pg_definition
   script:
-    - carton install --deployment --without=cache
+    - carton install --deployment --without=cache --without=test
     - MOJO_CONFIG=t/postgresql2.conf make minion &
     - sleep 3
     - MOJO_CONFIG=t/postgresql2.conf make test-pg
@@ -134,10 +138,11 @@ postgresql2:
     - MOJO_CONFIG=t/postgresql2.conf make cleanbdd
     - MOJO_CONFIG=t/postgresql2.conf make cleanfiles
     - MOJO_CONFIG=t/postgresql2.conf make stats
+    - MOJO_CONFIG=t/postgresql2.conf make cover
 postgresql3:
   <<: *pg_definition
   script:
-    - carton install --deployment --without=sqlite --without=cache
+    - carton install --deployment --without=sqlite --without=cache --without=test
     - export PGPASSWORD=lutim_pwd; echo 'CREATE DATABASE lutim_minion WITH OWNER lutim;' | psql -h postgres -U lutim lutim_db
     - MOJO_CONFIG=t/postgresql3.conf make minion &
     - sleep 3
@@ -146,3 +151,4 @@ postgresql3:
     - MOJO_CONFIG=t/postgresql3.conf make cleanbdd
     - MOJO_CONFIG=t/postgresql3.conf make cleanfiles
     - MOJO_CONFIG=t/postgresql3.conf make stats
+    - MOJO_CONFIG=t/postgresql3.conf make cover
diff --git a/Makefile b/Makefile
index ebde30e..3c8a686 100644
--- a/Makefile
+++ b/Makefile
@@ -20,11 +20,14 @@ stats-locales:
 podcheck:
 	podchecker lib/Lutim/DB/Image.pm
 
+cover:
+	PERL5OPT='-Ilib/' HARNESS_PERL_SWITCHES='-MDevel::Cover' $(CARTON) cover --ignore_re '^local'
+
 test-sqlite:
-	$(CARTON) $(REAL_LUTIM) test
+	@PERL5OPT='-Ilib/' HARNESS_PERL_SWITCHES='-MDevel::Cover' $(CARTON) $(REAL_LUTIM) test
 
 test-pg:
-	$(CARTON) $(REAL_LUTIM) test
+	@PERL5OPT='-Ilib/' HARNESS_PERL_SWITCHES='-MDevel::Cover' $(CARTON) $(REAL_LUTIM) test
 
 test: podcheck test-sqlite test-pg
 
diff --git a/cpanfile b/cpanfile
index cf40b78..4553738 100644
--- a/cpanfile
+++ b/cpanfile
@@ -37,3 +37,6 @@ feature 'cache', 'Cache system' => sub {
     requires 'CHI';
     requires 'Data::Serializer';
 };
+feature 'test' => sub {
+    requires 'Devel::Cover';
+};
diff --git a/cpanfile.snapshot b/cpanfile.snapshot
index 477b1e7..457a7ec 100644
--- a/cpanfile.snapshot
+++ b/cpanfile.snapshot
@@ -897,6 +897,65 @@ DISTRIBUTIONS
       perl 5.008004
       strict 0
       warnings 0
+  Devel-Cover-1.29
+    pathname: P/PJ/PJCJ/Devel-Cover-1.29.tar.gz
+    provides:
+      Devel::Cover 1.29
+      Devel::Cover::Annotation::Git 1.29
+      Devel::Cover::Annotation::Random 1.29
+      Devel::Cover::Annotation::Svk 1.29
+      Devel::Cover::Branch 1.29
+      Devel::Cover::Collection 1.29
+      Devel::Cover::Collection::Template::Provider 1.29
+      Devel::Cover::Condition 1.29
+      Devel::Cover::Condition_and_2 1.29
+      Devel::Cover::Condition_and_3 1.29
+      Devel::Cover::Condition_or_2 1.29
+      Devel::Cover::Condition_or_3 1.29
+      Devel::Cover::Condition_xor_4 1.29
+      Devel::Cover::Criterion 1.29
+      Devel::Cover::DB 1.29
+      Devel::Cover::DB::Criterion 1.29
+      Devel::Cover::DB::Digests 1.29
+      Devel::Cover::DB::File 1.29
+      Devel::Cover::DB::IO 1.29
+      Devel::Cover::DB::IO::Base 1.29
+      Devel::Cover::DB::IO::JSON 1.29
+      Devel::Cover::DB::IO::Sereal 1.29
+      Devel::Cover::DB::IO::Storable 1.29
+      Devel::Cover::DB::Run 1.29
+      Devel::Cover::DB::Structure 1.29
+      Devel::Cover::Html_Common 1.29
+      Devel::Cover::Op 1.29
+      Devel::Cover::Pod 1.29
+      Devel::Cover::Report::Compilation 1.29
+      Devel::Cover::Report::Html 1.29
+      Devel::Cover::Report::Html_basic 1.29
+      Devel::Cover::Report::Html_basic::Template::Provider 1.29
+      Devel::Cover::Report::Html_minimal 1.29
+      Devel::Cover::Report::Html_subtle 1.29
+      Devel::Cover::Report::Html_subtle::Template::Provider 1.29
+      Devel::Cover::Report::Json 1.29
+      Devel::Cover::Report::Sort 1.29
+      Devel::Cover::Report::Text 1.29
+      Devel::Cover::Report::Text2 1.29
+      Devel::Cover::Report::Vim 1.29
+      Devel::Cover::Report::Vim::Template::Provider 1.29
+      Devel::Cover::Statement 1.29
+      Devel::Cover::Subroutine 1.29
+      Devel::Cover::Test 1.29
+      Devel::Cover::Time 1.29
+      Devel::Cover::Truth_Table 1.29
+      Devel::Cover::Truth_Table::Row 1.29
+      Devel::Cover::Util 1.29
+      Devel::Cover::Web 1.29
+    requirements:
+      B::Debug 0
+      Digest::MD5 0
+      ExtUtils::MakeMaker 0
+      HTML::Entities 3.69
+      Storable 0
+      Test::More 0
   Devel-GlobalDestruction-0.14
     pathname: H/HA/HAARG/Devel-GlobalDestruction-0.14.tar.gz
     provides:
@@ -1124,6 +1183,27 @@ DISTRIBUTIONS
       Test::More 0
       Test::Warn 0
       perl 5.006
+  HTML-Parser-3.72
+    pathname: G/GA/GAAS/HTML-Parser-3.72.tar.gz
+    provides:
+      HTML::Entities 3.69
+      HTML::Filter 3.72
+      HTML::HeadParser 3.71
+      HTML::LinkExtor 3.69
+      HTML::Parser 3.72
+      HTML::PullParser 3.57
+      HTML::TokeParser 3.69
+    requirements:
+      ExtUtils::MakeMaker 0
+      HTML::Tagset 3
+      XSLoader 0
+      perl 5.008
+  HTML-Tagset-3.20
+    pathname: P/PE/PETDANCE/HTML-Tagset-3.20.tar.gz
+    provides:
+      HTML::Tagset 3.20
+    requirements:
+      ExtUtils::MakeMaker 0
   HTTP-Lite-2.44
     pathname: N/NE/NEILB/HTTP-Lite-2.44.tar.gz
     provides: