diff --git a/commands/webui.go b/commands/webui.go
index 6cbaff78b8db0945c8f290f16a4b5fc5fb66fec4..ea9fde0cf584642345eeefaa779702c7c7dd2711 100644
--- a/commands/webui.go
+++ b/commands/webui.go
@@ -2,6 +2,7 @@ package commands
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"io"
 	"log"
@@ -178,7 +179,7 @@ func runWebUI(env *execenv.Env, opts webUIOptions) error {
 	env.Out.Println("Press Ctrl+c to quit")
 
 	configOpen, err := env.Repo.AnyConfig().ReadBool(webUIOpenConfigKey)
-	if err == repository.ErrNoConfigEntry {
+	if errors.Is(err, repository.ErrNoConfigEntry) {
 		// default to true
 		configOpen = true
 	} else if err != nil {
diff --git a/entities/identity/identity_user.go b/entities/identity/identity_user.go
index e671e6621d3bdcfc9a15438acd1d5b4d7315929e..7eb374d413f4408835f54b4ae1da34ba636c2e60 100644
--- a/entities/identity/identity_user.go
+++ b/entities/identity/identity_user.go
@@ -36,10 +36,10 @@ func GetUserIdentity(repo repository.Repo) (*Identity, error) {
 
 func GetUserIdentityId(repo repository.Repo) (entity.Id, error) {
 	val, err := repo.LocalConfig().ReadString(identityConfigKey)
-	if err == repository.ErrNoConfigEntry {
+	if errors.Is(err, repository.ErrNoConfigEntry) {
 		return entity.UnsetId, ErrNoIdentitySet
 	}
-	if err == repository.ErrMultipleConfigEntry {
+	if errors.Is(err, repository.ErrMultipleConfigEntry) {
 		return entity.UnsetId, ErrMultipleIdentitiesSet
 	}
 	if err != nil {
@@ -58,7 +58,7 @@ func GetUserIdentityId(repo repository.Repo) (entity.Id, error) {
 // IsUserIdentitySet say if the user has set his identity
 func IsUserIdentitySet(repo repository.Repo) (bool, error) {
 	_, err := repo.LocalConfig().ReadString(identityConfigKey)
-	if err == repository.ErrNoConfigEntry {
+	if errors.Is(err, repository.ErrNoConfigEntry) {
 		return false, nil
 	}
 	if err != nil {
diff --git a/repository/config.go b/repository/config.go
index c6880b7d0bae5824c8d71a3393e521b5a9dde49a..7e1ee6e85ec6e45dfa224e7df7e751f5cfc8af23 100644
--- a/repository/config.go
+++ b/repository/config.go
@@ -2,6 +2,7 @@ package repository
 
 import (
 	"errors"
+	"fmt"
 	"strconv"
 	"time"
 )
@@ -11,6 +12,14 @@ var (
 	ErrMultipleConfigEntry = errors.New("multiple config entry for the given key")
 )
 
+func newErrNoConfigEntry(key string) error {
+	return fmt.Errorf("%w: missing key %s", ErrNoConfigEntry, key)
+}
+
+func newErrMultipleConfigEntry(key string) error {
+	return fmt.Errorf("%w: duplicated key %s", ErrMultipleConfigEntry, key)
+}
+
 // Config represent the common function interacting with the repository config storage
 type Config interface {
 	ConfigRead
@@ -96,7 +105,7 @@ func (m *mergedConfig) ReadBool(key string) (bool, error) {
 	if err == nil {
 		return v, nil
 	}
-	if err != ErrNoConfigEntry && err != ErrMultipleConfigEntry {
+	if !errors.Is(err, ErrNoConfigEntry) && !errors.Is(err, ErrMultipleConfigEntry) {
 		return false, err
 	}
 	return m.global.ReadBool(key)
@@ -107,7 +116,7 @@ func (m *mergedConfig) ReadString(key string) (string, error) {
 	if err == nil {
 		return val, nil
 	}
-	if err != ErrNoConfigEntry && err != ErrMultipleConfigEntry {
+	if !errors.Is(err, ErrNoConfigEntry) && !errors.Is(err, ErrMultipleConfigEntry) {
 		return "", err
 	}
 	return m.global.ReadString(key)
@@ -118,7 +127,7 @@ func (m *mergedConfig) ReadTimestamp(key string) (time.Time, error) {
 	if err == nil {
 		return val, nil
 	}
-	if err != ErrNoConfigEntry && err != ErrMultipleConfigEntry {
+	if !errors.Is(err, ErrNoConfigEntry) && !errors.Is(err, ErrMultipleConfigEntry) {
 		return time.Time{}, err
 	}
 	return m.global.ReadTimestamp(key)
diff --git a/repository/config_mem.go b/repository/config_mem.go
index 019bc11167f1d2d939ac569ff4be0a6edfe234b5..55b12fd7c3ba9fc413eeb4095ca92d3ee8f9e30f 100644
--- a/repository/config_mem.go
+++ b/repository/config_mem.go
@@ -49,7 +49,7 @@ func (mc *MemConfig) ReadString(key string) (string, error) {
 	key = normalizeKey(key)
 	val, ok := mc.config[key]
 	if !ok {
-		return "", ErrNoConfigEntry
+		return "", newErrNoConfigEntry(key)
 	}
 
 	return val, nil
diff --git a/repository/config_testing.go b/repository/config_testing.go
index f8a2762b6eecde560264b4f0d9382db4007dac1d..8c22934a7d8f8f45164f9bc3ec9a34406acf0096 100644
--- a/repository/config_testing.go
+++ b/repository/config_testing.go
@@ -53,7 +53,7 @@ func testConfig(t *testing.T, config Config) {
 	}, configs)
 
 	_, err = config.ReadBool("section.true")
-	require.Equal(t, ErrNoConfigEntry, err)
+	require.ErrorIs(t, err, ErrNoConfigEntry)
 
 	err = config.RemoveAll("section.nonexistingkey")
 	require.Error(t, err)
@@ -62,7 +62,7 @@ func testConfig(t *testing.T, config Config) {
 	require.NoError(t, err)
 
 	_, err = config.ReadString("section.key")
-	require.Equal(t, ErrNoConfigEntry, err)
+	require.ErrorIs(t, err, ErrNoConfigEntry)
 
 	err = config.RemoveAll("nonexistingsection")
 	require.Error(t, err)
diff --git a/repository/gogit.go b/repository/gogit.go
index b14efbe5b46374e17bada7aae7d660b43337c137..01c47d41b1d7c02b5a51d6ff6aba62abaaaf5762 100644
--- a/repository/gogit.go
+++ b/repository/gogit.go
@@ -2,6 +2,7 @@ package repository
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -270,7 +271,7 @@ func (repo *GoGitRepo) GetCoreEditor() (string, error) {
 	if err == nil && val != "" {
 		return val, nil
 	}
-	if err != nil && err != ErrNoConfigEntry {
+	if err != nil && !errors.Is(err, ErrNoConfigEntry) {
 		return "", err
 	}
 
diff --git a/repository/gogit_config.go b/repository/gogit_config.go
index 891e3ffb8525213bd99979ec9ee500204b159f4e..afa652b1983795dafd4b2f1fd984773b19f385fb 100644
--- a/repository/gogit_config.go
+++ b/repository/gogit_config.go
@@ -119,7 +119,7 @@ func (cr *goGitConfigReader) ReadString(key string) (string, error) {
 
 	sectionName := split[0]
 	if !cfg.Raw.HasSection(sectionName) {
-		return "", ErrNoConfigEntry
+		return "", newErrNoConfigEntry(key)
 	}
 	section := cfg.Raw.Section(sectionName)
 
@@ -127,24 +127,24 @@ func (cr *goGitConfigReader) ReadString(key string) (string, error) {
 	case len(split) == 2:
 		optionName := split[1]
 		if !section.HasOption(optionName) {
-			return "", ErrNoConfigEntry
+			return "", newErrNoConfigEntry(key)
 		}
 		if len(section.OptionAll(optionName)) > 1 {
-			return "", ErrMultipleConfigEntry
+			return "", newErrMultipleConfigEntry(key)
 		}
 		return section.Option(optionName), nil
 	default:
 		subsectionName := strings.Join(split[1:len(split)-1], ".")
 		optionName := split[len(split)-1]
 		if !section.HasSubsection(subsectionName) {
-			return "", ErrNoConfigEntry
+			return "", newErrNoConfigEntry(key)
 		}
 		subsection := section.Subsection(subsectionName)
 		if !subsection.HasOption(optionName) {
-			return "", ErrNoConfigEntry
+			return "", newErrNoConfigEntry(key)
 		}
 		if len(subsection.OptionAll(optionName)) > 1 {
-			return "", ErrMultipleConfigEntry
+			return "", newErrMultipleConfigEntry(key)
 		}
 		return subsection.Option(optionName), nil
 	}