diff --git a/integration/test_hurl.py b/integration/test_hurl.py
index ee20623a7..c4ca7b590 100755
--- a/integration/test_hurl.py
+++ b/integration/test_hurl.py
@@ -7,7 +7,7 @@ import subprocess
 import os
 import platform
 import check_json_output
-import tempfile
+import re
 
 
 def decode_string(encoded):
@@ -93,11 +93,35 @@ def test(hurl_file):
     if os.path.exists(f):
         expected = open(f, "rb").read()
         actual = result.stdout
-        if expected != actual:
+        if actual != expected:
             print(">>> error in stdout")
             print(f"actual: <{actual}>\nexpected: <{expected}>")
             sys.exit(1)
 
+    # stdout with textual pattern / line per line
+    f = hurl_file.replace(".hurl", ".out.pattern")
+    if os.path.exists(f):
+        expected = open(f, "r").read()
+        actual = decode_string(result.stdout)
+        expected_lines = expected.split("\n")
+        expected_pattern_lines = [parse_pattern(line) for line in expected_lines]
+        actual_lines = actual.split("\n")
+        if len(actual_lines) != len(expected_pattern_lines):
+            print(">>> error in stderr / mismatch in number of lines")
+            print(
+                "actual: %d lines\nexpected: %d lines"
+                % (len(actual_lines), len(expected_lines))
+            )
+            sys.exit(1)
+        for i in range(len(expected_pattern_lines)):
+            if not re.match(expected_pattern_lines[i], actual_lines[i]):
+                print(f">>> error in stdout in line {i+1}")
+                print(f"actual: <{actual_lines[i]}>")
+                print(
+                    f"expected: <{expected_lines[i]}> (translated to regex <{expected_pattern_lines[i]}>)"
+                )
+                sys.exit(1)
+
     # stdout (json)
     if os.path.exists(json_output_file):
         expected = open(json_output_file).read()
@@ -109,7 +133,7 @@ def test(hurl_file):
     if os.path.exists(f):
         expected = open(f).read().strip()
         actual = decode_string(result.stderr).strip()
-        if expected != actual:
+        if actual != expected:
             print(">>> error in stderr")
             print(f"actual: <{actual}>\nexpected: <{expected}>")
             sys.exit(1)
@@ -123,6 +147,30 @@ def test(hurl_file):
                 print(f"actual: <{actual}>\nexpected: <{expected}>")
                 sys.exit(1)
 
+    # stderr with textual pattern / line per line
+    f = hurl_file.replace(".hurl", ".err.pattern")
+    if os.path.exists(f):
+        expected = open(f, "r").read()
+        actual = decode_string(result.stderr)
+        expected_lines = expected.split("\n")
+        expected_pattern_lines = [parse_pattern(line) for line in expected_lines]
+        actual_lines = re.split(r"\r?\n", actual)
+        if len(actual_lines) != len(expected_pattern_lines):
+            print(">>> error in stderr / mismatch in number of lines")
+            print(
+                "actual: %d lines\nexpected: %d lines"
+                % (len(actual_lines), len(expected_lines))
+            )
+            sys.exit(1)
+        for i in range(len(expected_pattern_lines)):
+            if not re.match(expected_pattern_lines[i], actual_lines[i]):
+                print(f">>> error in stderr in line {i+1}")
+                print(f"actual: <{actual_lines[i]}>")
+                print(
+                    f"expected: <{expected_lines[i]}> (translated to regex <{expected_pattern_lines[i]}>)"
+                )
+                sys.exit(1)
+
     # curl output
     if os.path.exists(curl_file):
         expected_commands = []
@@ -151,6 +199,16 @@ def test(hurl_file):
                 sys.exit(1)
 
 
+def parse_pattern(s):
+    # Escape regex metacharacters
+    for c in [".", "(", ")", "[", "]", "^", "$", "*", "+", "?"]:
+        s = s.replace(c, "\\" + c)
+
+    s = re.sub("~+", ".*", s)
+    s = "^" + s + "$"
+    return s
+
+
 def main():
     for hurl_file in sys.argv[1:]:
         test(hurl_file)
diff --git a/integration/tests_ok/include.out b/integration/tests_ok/include.out.pattern
similarity index 89%
rename from integration/tests_ok/include.out
rename to integration/tests_ok/include.out.pattern
index 361a0bcf2..bee67ba8e 100644
--- a/integration/tests_ok/include.out
+++ b/integration/tests_ok/include.out.pattern
@@ -1,7 +1,7 @@
 HTTP/1.0 200
-Date: DATE
 Content-Type: text/html; charset=utf-8
 Content-Length: 5
 Server: Flask Server
+Date: ~~~
 
 Hello
\ No newline at end of file
diff --git a/integration/tests_ok/include.py b/integration/tests_ok/include.py
index 582d5fca9..435c7ec2a 100644
--- a/integration/tests_ok/include.py
+++ b/integration/tests_ok/include.py
@@ -4,5 +4,4 @@ from flask import Response
 
 @app.route("/include")
 def include():
-    headers = {"Date": "DATE"}
-    return Response("Hello", headers=headers)
+    return Response("Hello")