diff --git a/tests/test_integration.py b/tests/test_integration.py
new file mode 100644
index 0000000..96e27bd
--- /dev/null
+++ b/tests/test_integration.py
@@ -0,0 +1,119 @@
+import textwrap
+
+import pytest
+
+from utils import (
+    DOT_TOX,
+    NATIVE_EXEC_PREFIX_MSG,
+    NATIVE_EXECUTABLE,
+    NATIVE_SITE_PACKAGES,
+    NATIVE_TOXENV,
+    TOX_VERSION,
+    TOX4,
+    envs_from_tox_ini,
+    modify_config,
+    expand_tox,
+    prep_tox_output,
+    tox,
+    tox_footer,
+)
+
+
+def test_native_toxenv_current_env():
+    result = tox("-e", NATIVE_TOXENV, "--current-env")
+    assert result.stdout.splitlines()[0] == NATIVE_EXEC_PREFIX_MSG
+    assert not (DOT_TOX / NATIVE_TOXENV / "lib").is_dir()
+
+
+@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
+def test_print_deps(toxenv, print_deps_stdout_arg):
+    result = tox("-e", toxenv, print_deps_stdout_arg)
+    expected = expand_tox(textwrap.dedent(
+        f"""
+        [[TOX4:tox]]
+        six
+        py
+        {tox_footer(toxenv)}
+        """
+    ).lstrip())
+    assert prep_tox_output(result.stdout) == expected
+
+
+@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
+@pytest.mark.parametrize("pre_post", ["pre", "post", "both"])
+def test_print_deps_with_commands_pre_post(projdir, toxenv, pre_post, print_deps_stdout_arg):
+    with modify_config(projdir / 'tox.ini') as config:
+        if pre_post == "both":
+            config["testenv"]["commands_pre"] = "echo unexpected"
+            config["testenv"]["commands_post"] = "echo unexpected"
+        else:
+            config["testenv"][f"commands_{pre_post}"] = "echo unexpected"
+    result = tox("-e", toxenv, print_deps_stdout_arg)
+    expected = expand_tox(textwrap.dedent(
+        f"""
+        [[TOX4:tox]]
+        six
+        py
+        {tox_footer(toxenv)}
+        """
+    ).lstrip())
+    assert sorted(prep_tox_output(result.stdout).splitlines()) == sorted(
+        expected.splitlines()
+    )
+    assert result.stderr == ""
+
+
+@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
+def test_print_deps_with_tox_minversion(projdir, toxenv, print_deps_stdout_arg):
+    with modify_config(projdir / "tox.ini") as config:
+        config["tox"]["minversion"] = "3.13"
+    result = tox("-e", toxenv, print_deps_stdout_arg)
+    expected = textwrap.dedent(
+        f"""
+        tox>=3.13
+        six
+        py
+        {tox_footer(toxenv)}
+        """
+    ).lstrip()
+    assert prep_tox_output(result.stdout) == expected
+
+
+@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
+def test_print_deps_with_tox_requires(projdir, toxenv, print_deps_stdout_arg):
+    with modify_config(projdir / "tox.ini") as config:
+        config["tox"]["requires"] = "\n    setuptools > 30\n    pluggy"
+    result = tox("-e", toxenv, print_deps_stdout_arg)
+    expected = expand_tox(textwrap.dedent(
+        f"""
+        setuptools>30
+        pluggy
+        [[TOX4:tox]]
+        six
+        py
+        {tox_footer(toxenv)}
+        """
+    ).lstrip())
+    assert prep_tox_output(result.stdout) == expected
+
+
+@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
+def test_print_deps_with_tox_minversion_and_requires(
+    projdir, toxenv, print_deps_stdout_arg
+):
+    with modify_config(projdir / "tox.ini") as config:
+        config["tox"]["minversion"] = "3.13"
+        config["tox"]["requires"] = "\n    setuptools > 30\n    pluggy"
+    result = tox("-e", toxenv, print_deps_stdout_arg)
+    expected = expand_tox(textwrap.dedent(
+        f"""
+        [[TOX3:tox>=3.13]]
+        setuptools>30
+        pluggy
+        [[TOX4:tox>=3.13]]
+        six
+        py
+        {tox_footer(toxenv)}
+        """
+    ).lstrip())
+    assert prep_tox_output(result.stdout) == expected
diff --git a/tests/test_integration_tox3.py b/tests/test_integration_tox3.py
index 0f5eb35..45c2be1 100644
--- a/tests/test_integration_tox3.py
+++ b/tests/test_integration_tox3.py
@@ -27,12 +27,6 @@
     pytest.skip("skipping tests for tox 3", allow_module_level=True)
 
 
-def test_native_toxenv_current_env():
-    result = tox("-e", NATIVE_TOXENV, "--current-env")
-    assert result.stdout.splitlines()[0] == NATIVE_EXEC_PREFIX_MSG
-    assert not (DOT_TOX / NATIVE_TOXENV / "lib").is_dir()
-
-
 @needs_all_pythons
 def test_all_toxenv_current_env():
     result = tox("--current-env", check=False)
@@ -60,94 +54,6 @@ def test_all_toxenv_current_env_skip_missing():
     assert result.returncode == 0
 
 
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-def test_print_deps(toxenv, print_deps_stdout_arg):
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert result.stdout == expected
-
-
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-@pytest.mark.parametrize("pre_post", ["pre", "post", "both"])
-def test_print_deps_with_commands_pre_post(projdir, toxenv, pre_post, print_deps_stdout_arg):
-    with modify_config(projdir / 'tox.ini') as config:
-        if pre_post == "both":
-            config["testenv"]["commands_pre"] = "echo unexpected"
-            config["testenv"]["commands_post"] = "echo unexpected"
-        else:
-            config["testenv"][f"commands_{pre_post}"] = "echo unexpected"
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert result.stdout == expected
-    assert result.stderr == ""
-
-
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-def test_print_deps_with_tox_minversion(projdir, toxenv, print_deps_stdout_arg):
-    with modify_config(projdir / "tox.ini") as config:
-        config["tox"]["minversion"] = "3.13"
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        tox >= 3.13
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert result.stdout == expected
-
-
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-def test_print_deps_with_tox_requires(projdir, toxenv, print_deps_stdout_arg):
-    with modify_config(projdir / "tox.ini") as config:
-        config["tox"]["requires"] = "\n    setuptools > 30\n    pluggy"
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        setuptools > 30
-        pluggy
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert result.stdout == expected
-
-
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-def test_print_deps_with_tox_minversion_and_requires(
-    projdir, toxenv, print_deps_stdout_arg
-):
-    with modify_config(projdir / "tox.ini") as config:
-        config["tox"]["minversion"] = "3.13"
-        config["tox"]["requires"] = "\n    setuptools > 30\n    pluggy"
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        tox >= 3.13
-        setuptools > 30
-        pluggy
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert result.stdout == expected
-
-
 @pytest.mark.parametrize("toxenv", envs_from_tox_ini())
 def test_print_extras(toxenv, print_extras_stdout_arg):
     result = tox("-e", toxenv, print_extras_stdout_arg)
diff --git a/tests/test_integration_tox4.py b/tests/test_integration_tox4.py
index 90cf7df..0de2576 100644
--- a/tests/test_integration_tox4.py
+++ b/tests/test_integration_tox4.py
@@ -24,105 +24,6 @@
     pytest.skip("skipping tests for tox 4", allow_module_level=True)
 
 
-def test_native_toxenv_current_env():
-    result = tox("-e", NATIVE_TOXENV, "--current-env")
-    assert result.stdout.splitlines()[0] == NATIVE_EXEC_PREFIX_MSG
-    assert not (DOT_TOX / NATIVE_TOXENV / "lib").is_dir()
-
-
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-def test_print_deps(toxenv, print_deps_stdout_arg):
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        tox
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert prep_tox_output(result.stdout) == expected
-
-
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-@pytest.mark.parametrize("pre_post", ["pre", "post", "both"])
-def test_print_deps_with_commands_pre_post(projdir, toxenv, pre_post, print_deps_stdout_arg):
-    with modify_config(projdir / 'tox.ini') as config:
-        if pre_post == "both":
-            config["testenv"]["commands_pre"] = "echo unexpected"
-            config["testenv"]["commands_post"] = "echo unexpected"
-        else:
-            config["testenv"][f"commands_{pre_post}"] = "echo unexpected"
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        tox
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert sorted(prep_tox_output(result.stdout).splitlines()) == sorted(
-        expected.splitlines()
-    )
-    assert result.stderr == ""
-
-
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-def test_print_deps_with_tox_minversion(projdir, toxenv, print_deps_stdout_arg):
-    with modify_config(projdir / "tox.ini") as config:
-        config["tox"]["minversion"] = "3.13"
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        tox>=3.13
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert prep_tox_output(result.stdout) == expected
-
-
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-def test_print_deps_with_tox_requires(projdir, toxenv, print_deps_stdout_arg):
-    with modify_config(projdir / "tox.ini") as config:
-        config["tox"]["requires"] = "\n    setuptools > 30\n    pluggy"
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        setuptools>30
-        pluggy
-        tox
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert prep_tox_output(result.stdout) == expected
-
-
-@pytest.mark.parametrize("toxenv", envs_from_tox_ini())
-def test_print_deps_with_tox_minversion_and_requires(
-    projdir, toxenv, print_deps_stdout_arg
-):
-    with modify_config(projdir / "tox.ini") as config:
-        config["tox"]["minversion"] = "3.13"
-        config["tox"]["requires"] = "\n    setuptools > 30\n    pluggy"
-    result = tox("-e", toxenv, print_deps_stdout_arg)
-    expected = textwrap.dedent(
-        f"""
-        setuptools>30
-        pluggy
-        tox>=3.13
-        six
-        py
-        {tox_footer(toxenv)}
-        """
-    ).lstrip()
-    assert prep_tox_output(result.stdout) == expected
-
-
 @pytest.mark.parametrize("toxenv", envs_from_tox_ini())
 def test_print_extras(toxenv, print_extras_stdout_arg):
     result = tox("-e", toxenv, print_extras_stdout_arg)
diff --git a/tests/utils.py b/tests/utils.py
index fe7fbcf..0cad923 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -117,10 +117,36 @@ def tox_footer(envs=None, spaces=8):
 
 
 def prep_tox_output(output):
-    """Remove time info from tox output"""
-    result = re.sub(r" \((\d+\.\d+|\d+) seconds\)", "", output)
-    result = re.sub(r" ✔ in (\d+\.\d+|\d+) seconds", "", result)
-    return result
+    """Remove time info from tox 4 output.
+    Strip spaces around operators in tox 3 output."""
+    if TOX4:
+        output = re.sub(r" \((\d+\.\d+|\d+) seconds\)", "", output)
+        output = re.sub(r" ✔ in (\d+\.\d+|\d+) seconds", "", output)
+    else:
+        output = re.sub(" ((<|>)=?) ", r"\1", output)
+    return output
+
+
+def expand_tox(text):
+    """Replace [[TOX4:...]] and [[TOX3:...]] expressions,
+    empty liens are stripped if created."""
+    source_lines = text.splitlines()
+    out_lines = []
+    for line in source_lines:
+        if not line:
+            out_lines.append(line)
+            continue
+        if TOX4:
+            line = re.sub(r"\[\[TOX3:[^\]]*\]\]", "", line)
+            line = re.sub(r"\[\[TOX4:([^\]]*)\]\]", r"\1", line)
+        else:
+            line = re.sub(r"\[\[TOX4:[^\]]*\]\]", "", line)
+            line = re.sub(r"\[\[TOX3:([^\]]*)\]\]", r"\1", line)
+        if line:
+            out_lines.append(line)
+    if text[-1] == "\n":
+        out_lines.append("")
+    return "\n".join(out_lines)
 
 
 needs_all_pythons = pytest.mark.skipif(