diff --git a/algo/tests/testTools.cpp b/algo/tests/testTools.cpp
index cbfad8893980525082bc2e11010263210b10825d..1a721828478c89832a9fce63d861d5eb0ce4e719 100644
--- a/algo/tests/testTools.cpp
+++ b/algo/tests/testTools.cpp
@@ -2,6 +2,29 @@
 #include <core/fasta.h>
 #include "tests.h"
 
+void testOnlineFasta1() {
+  OnlineFasta fa("../../data/test1.fa");
+  OnlineFasta fq("../../data/test1.fq");
+  int nb_seq = 0;
+
+  TAP_TEST(fa.getLineNb() == 1, TEST_O_FASTA_LINE_NB, "");
+  TAP_TEST(fq.getLineNb() == 1, TEST_O_FASTA_LINE_NB, "");
+
+  while (fa.hasNext()) {
+    TAP_TEST(fq.hasNext(), TEST_O_FASTA_HAS_NEXT, "");
+    fa.next();
+    fq.next();
+    Sequence s1 = fa.getSequence();
+    Sequence s2 = fq.getSequence();
+    TAP_TEST(s1.label == s2.label && s1.label_full == s2.label_full
+             && s1.sequence == s2.sequence, TEST_O_FASTA_GET_SEQUENCE, "fa: " << fa.getSequence() << endl << "fq: " << fq.getSequence());
+    nb_seq++;
+  }
+  TAP_TEST(fq.getLineNb() == 20, TEST_O_FASTA_LINE_NB, "");
+  TAP_TEST(! fq.hasNext(), TEST_O_FASTA_HAS_NEXT, "");
+  TAP_TEST(nb_seq == 5, TEST_O_FASTA_HAS_NEXT, "");
+}
+
 void testFasta1() {
   Fasta fa("../../data/test1.fa");
   Fasta fq("../../data/test1.fq");
@@ -123,6 +146,7 @@ void testExtractBasename() {
 }
 
 void testTools() {
+  testOnlineFasta1();
   testFasta1();
   testRevcomp();
   testCreateSequence();
diff --git a/algo/tests/tests.h b/algo/tests/tests.h
index f490a2cce24e0f14241b29bb8fb1de050c4fb023..20b474b222f815a36a6b0909855a5527f985ebcc 100644
--- a/algo/tests/tests.h
+++ b/algo/tests/tests.h
@@ -4,6 +4,9 @@
 enum {
   /* Tools tests */
   TEST_REVCOMP,
+  TEST_O_FASTA_HAS_NEXT,
+  TEST_O_FASTA_GET_SEQUENCE,
+  TEST_O_FASTA_LINE_NB,
   TEST_FASTA_SIZE,
   TEST_FASTA_LABEL,
   TEST_FASTA_LABEL_FULL,
@@ -101,6 +104,9 @@ enum {
 
 inline void declare_tests() {
   RECORD_TAP_TEST(TEST_REVCOMP, "revcomp");
+  RECORD_TAP_TEST(TEST_O_FASTA_HAS_NEXT, "OnlineFasta hasNext()");
+  RECORD_TAP_TEST(TEST_O_FASTA_GET_SEQUENCE, "OnlineFasta next()");
+  RECORD_TAP_TEST(TEST_O_FASTA_LINE_NB, "OnlineFasta getLineNb()");
   RECORD_TAP_TEST(TEST_FASTA_SIZE, "Fasta/Fastq size");
   RECORD_TAP_TEST(TEST_FASTA_LABEL, "Fasta/Fastq label");
   RECORD_TAP_TEST(TEST_FASTA_LABEL_FULL, "Fasta/Fastq full label");