diff --git a/general_tests/ers_linenr_it_test.go b/general_tests/ers_linenr_it_test.go
new file mode 100644
index 000000000..672b1d634
--- /dev/null
+++ b/general_tests/ers_linenr_it_test.go
@@ -0,0 +1,191 @@
+//go:build integration
+
+/*
+Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
+Copyright (C) ITsysCOM GmbH
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>
+*/
+
+package general_tests
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/cgrates/cgrates/utils"
+)
+
+func TestERsLineNr(t *testing.T) {
+	switch *utils.DBType {
+	case utils.MetaInternal:
+	case utils.MetaMySQL, utils.MetaMongo, utils.MetaPostgres:
+		t.SkipNow()
+	default:
+		t.Fatal("unsupported dbtype value")
+	}
+	csvFd, fwvFd, xmlFd, procFd := t.TempDir(), t.TempDir(), t.TempDir(), t.TempDir()
+	content := fmt.Sprintf(`{
+"general": {
+	"log_level": 7
+},
+"data_db": {
+	"db_type": "*internal"
+},
+"stor_db": {
+	"db_type": "*internal"
+},
+"ers": {
+	"enabled": true,
+	"sessions_conns": [],
+	"readers": [
+		{
+			"id": "file_csv_reader",
+			"run_delay":  "-1",
+			"type": "*file_csv",
+			"source_path": "%s",
+			"flags": ["*dryrun"],
+			"processed_path": "%s",
+			"fields":[
+				{"tag": "FileName", "path": "*cgreq.FileName", "type": "*variable", "value": "~*vars.*fileName"},
+				{"tag": "LineNumber", "path": "*cgreq.LineNumber", "type": "*variable", "value": "~*vars.*fileLineNumber"},
+				{"tag": "Field", "path": "*cgreq.Field", "type": "*variable", "value": "~*req.0"}
+			]
+		},
+		{
+			"id": "file_fwv_reader",
+			"run_delay":  "-1",
+			"type": "*file_fwv",
+			"source_path": "%s",
+			"flags": ["*dryrun"],
+			"processed_path": "%s",
+			"fields":[
+				{"tag": "FileName2", "path": "*cgreq.FileName", "type": "*variable", "value": "~*vars.*fileName"},
+				{"tag": "LineNumber", "path": "*cgreq.LineNumber", "type": "*variable", "value": "~*vars.*fileLineNumber"},
+				{"tag": "FileSeqNr", "path": "*cgreq.FileSeqNr", "type": "*variable", "value": "~*hdr.3-6", "padding":"*zeroleft"},
+				{"tag": "Field", "path": "*cgreq.Field", "type": "*variable", "value": "~*req.0-5", "padding":"*right"},
+				{"tag": "NrOfElements", "type": "*variable", "path":"*cgreq.NrOfElements", "value": "~*trl.3-4"},
+			]
+		},
+		{
+			"id": "file_xml_reader",
+			"run_delay":  "-1",
+			"type": "*file_xml",
+			"source_path": "%s",
+			"flags": ["*dryrun"],
+			"processed_path": "%s",
+			"opts": {
+				"xmlRootPath": "root.field"
+			},
+			"fields":[
+				{"tag": "FileName", "path": "*cgreq.FileName", "type": "*variable", "value": "~*vars.*fileName"},
+				{"tag": "LineNumber", "path": "*cgreq.LineNumber", "type": "*variable", "value": "~*vars.*fileLineNumber"},
+				{"tag": "Field", "path": "*cgreq.Field", "type": "*variable", "value": "~*req.root.field"}
+			]
+		}
+	]
+}
+}`, csvFd, procFd, fwvFd, procFd, xmlFd, procFd)
+
+	buf := &bytes.Buffer{}
+	testEnv := TestEnvironment{
+		ConfigJSON: content,
+		LogBuffer:  buf,
+	}
+	_, _ = testEnv.Setup(t, 0)
+
+	fileIdx := 0
+	createFile := func(t *testing.T, dir, ext, content string) {
+		fileIdx++
+		filePath := filepath.Join(dir, fmt.Sprintf("file%d%s", fileIdx, ext))
+		if err := os.WriteFile(filePath, []byte(content), 0644); err != nil {
+			t.Fatalf("could not write to file %s: %v", filePath, err)
+		}
+	}
+
+	verifyLogLines := func(t *testing.T, reader io.Reader) {
+		fieldRegex := regexp.MustCompile(`"Field":"test(\d+)"`)
+		lineNumberRegex := regexp.MustCompile(`"LineNumber":"(\d+)"`)
+		records := 0
+		scanner := bufio.NewScanner(reader)
+		for scanner.Scan() {
+			line := scanner.Text()
+			if !strings.Contains(line, `"Field":"test`) {
+				continue
+			}
+
+			records++
+
+			fieldMatch := fieldRegex.FindStringSubmatch(line)
+			lineNumberMatch := lineNumberRegex.FindStringSubmatch(line)
+
+			if len(fieldMatch) != 2 || len(lineNumberMatch) != 2 {
+				t.Fatalf("invalid log line format: %s", line)
+			}
+
+			testNumber, err := strconv.Atoi(fieldMatch[1])
+			if err != nil {
+				t.Fatal(err)
+			}
+			lineNumber, err := strconv.Atoi(lineNumberMatch[1])
+			if err != nil {
+				t.Fatal(err)
+			}
+			if testNumber != lineNumber {
+				t.Errorf("mismatch in line: %s, field number: %d, line number: %d", line, testNumber, lineNumber)
+			}
+		}
+
+		if err := scanner.Err(); err != nil {
+			t.Errorf("error reading input: %v", err)
+		}
+
+		if records != 18 {
+			t.Errorf("expected ERs to process 18 records, but it processed %d records", records)
+		}
+	}
+
+	// Create the files inside the source directories of the readers.
+	createFile(t, csvFd, utils.CSVSuffix, "test1\ntest2\ntest3\ntest4\ntest5\ntest6")
+	createFile(t, fwvFd, utils.FWVSuffix, `HDR002
+test1
+test2
+test3
+test4
+test5
+test6
+TRL6
+`)
+	createFile(t, xmlFd, utils.XMLSuffix, `<?xml version="1.0" encoding="ISO-8859-1"?>
+<root>
+  <field>test1</field>
+  <field>test2</field>
+  <field>test3</field>
+  <field>test4</field>
+  <field>test5</field>
+  <field>test6</field>
+</root>`)
+
+	time.Sleep(5 * time.Millisecond) // wait for the files to be processed
+
+	// Check that the suffixes of the 'test' fields match the LineNumber field.
+	logData := strings.NewReader(buf.String())
+	verifyLogLines(t, logData)
+}