diff --git a/.github/scripts/create_python_package.py b/.github/scripts/create_python_package.py
new file mode 100644
index 0000000000..107b9d3b71
--- /dev/null
+++ b/.github/scripts/create_python_package.py
@@ -0,0 +1,64 @@
+import os
+import zipfile
+import argparse
+import platform
+import tempfile
+import subprocess
+import urllib.request
+
+import rez.packages
+import rez.package_maker
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument("version", help="Python version")
+parser.add_argument("repository", help="Repository path")
+
+args = parser.parse_args()
+
+
+def make_root(variant: rez.packages.Variant, path: str):
+    dest = os.path.join(path, "python")
+
+    if platform.system() == "Windows":
+        with tempfile.TemporaryDirectory() as tmpdir:
+            archive_path = os.path.join(tmpdir, "python.nupkg")
+
+            url = f"https://globalcdn.nuget.org/packages/python.{variant.version}.nupkg"
+
+            print(f"Downloading {url!r}")
+            with urllib.request.urlopen(url) as archive:
+                with open(archive_path, "wb") as targetFile:
+                    targetFile.write(archive.read())
+
+            with zipfile.ZipFile(archive_path) as archive:
+                print(f"Extracting {archive_path!r} to {dest!r}")
+                archive.extractall(path=dest)
+    else:
+        cmd = [
+            "conda",
+            "create",
+            "--prefix",
+            dest,
+            f"python={args.version}",
+            "pip",
+            "--yes",
+        ]
+        print(f"Running {' '.join(cmd)!r}")
+        subprocess.check_call(cmd)
+
+
+with rez.package_maker.make_package(
+    "python", os.path.expanduser(args.repository), make_root=make_root
+) as package:
+    package.version = args.version
+    commands = [
+        "env.PATH.prepend('{root}/python/bin')",
+    ]
+    if platform.system() == "Windows":
+        commands = [
+            "env.PATH.prepend('{root}/python/tools')",
+            "env.PATH.prepend('{root}/python/tools/DLLs')",
+        ]
+
+    package.commands = "\n".join(commands)
diff --git a/.github/workflows/wheel.yaml b/.github/workflows/wheel.yaml
index 4f6779a6e6..9a9a8c49f0 100644
--- a/.github/workflows/wheel.yaml
+++ b/.github/workflows/wheel.yaml
@@ -119,6 +119,8 @@ jobs:
       CURRENT_PLATFORM: ${{ matrix.os }}
 
     steps:
+    - uses: actions/checkout@v4
+
     - uses: actions/setup-python@v4
       with:
         python-version: 3.11
@@ -156,8 +158,46 @@ jobs:
         echo 'Running jctest with REZ_LAUNCHER_DEBUG=1'
         export REZ_LAUNCHER_DEBUG=1
 
-        jctest
+        _rez-install-test
 
         rez --help
         rez --version
         rez-env --help
+
+    - name: Integration test
+      shell: bash
+      run: |
+        set -e
+
+        if [[ "${CURRENT_PLATFORM}" != "windows-latest" ]]; then
+            eval "$(conda shell.bash hook)"
+            conda activate base
+        fi
+
+        set -x
+
+        interpreter_path=""
+        export REZ_PACKAGES_PATH="~/rez_packages"
+        if [[ "${CURRENT_PLATFORM}" == "windows-latest" ]]; then
+            interpreter_path='.venv/Scripts/python.exe'
+            export PATH=$(pwd)/.venv/Scripts/rez:$PATH
+        else
+            interpreter_path=.'venv/bin/python'
+            export PATH=$(pwd)/.venv/bin/rez:$PATH
+        fi
+        "${interpreter_path}" .github/scripts/create_python_package.py 3.7.9 $REZ_PACKAGES_PATH
+
+        # First, test that the "python" package is found and is the right version.
+        test "$(rez-env python -- python --version)" = 'Python 3.7.9'
+
+        # Now test that the -E flag is used. This manifest with sys.flags.ignore_environment=1
+        test $(rez-env python -- _rez-install-test | jq '.sysflags.ignore_environment' -r) -eq 1
+
+        # Now test that the executable used for runnin the rez command is the one from the rez
+        # install, not the rez package.
+        expected_path="$(pwd)/${interpreter_path}"
+        if [[ "${CURRENT_PLATFORM}" == "windows-latest" ]]; then
+            # Convert unix path to windows path
+            expected_path=$(cygpath -w "${expected_path}")
+        fi
+        test $(rez-env python -- _rez-install-test | jq '.executable' -r) = "${expected_path}"
diff --git a/src/rez/cli/_entry_points.py b/src/rez/cli/_entry_points.py
index 695a3c8d5f..2de7101708 100644
--- a/src/rez/cli/_entry_points.py
+++ b/src/rez/cli/_entry_points.py
@@ -8,6 +8,7 @@
 import os
 import os.path
 import sys
+import json
 
 
 ### Utility functions
@@ -62,14 +63,6 @@ def check_production_install():
 
 ### Entry points
 
-@register("jctest")
-def run_jctest():
-    print("argv:", sys.argv)
-    print("executable:", sys.executable)
-    print("sys.flags:", sys.flags)
-    return 0
-
-
 @register("rez")
 def run_rez():
     check_production_install()
@@ -322,3 +315,19 @@ def run_rez_rm():
     check_production_install()
     from rez.cli._main import run
     return run("rm")
+
+
+@register("_rez-install-test")
+def run_rez_install_test():
+    data = {
+        "argv": sys.argv,
+        "executable": sys.executable,
+        "sysflags": {
+            attr: getattr(sys.flags, attr)
+            for attr in dir(sys.flags)
+            if not attr.startswith("_") and not callable(getattr(sys.flags, attr))
+        }
+    }
+
+    print(json.dumps(data, indent=4))
+    return 0