From f65ad62bb3582b3dd5bf22a5bd3885c4f1f60716 Mon Sep 17 00:00:00 2001
From: Benedikt Bartscher <bb@senbax.de>
Date: Mon, 27 Jul 2026 16:42:13 +0200
Subject: [PATCH 1/3] add validation for EnvVar uppercase

---
 .../src/reflex_base/environment.py            |  6 +++++
 tests/units/test_environment.py               | 23 +++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/packages/reflex-base/src/reflex_base/environment.py b/packages/reflex-base/src/reflex_base/environment.py
index 33461cc19fc..9381d064515 100644
--- a/packages/reflex-base/src/reflex_base/environment.py
+++ b/packages/reflex-base/src/reflex_base/environment.py
@@ -405,7 +405,13 @@ def __init__(self, name: str, default: Any, type_: T) -> None:
             name: The environment variable name.
             default: The default value.
             type_: The type of the value.
+
+        Raises:
+            ValueError: If the name is not fully uppercase.
         """
+        if not name.isupper():
+            msg = f"Environment variable name must be uppercase: {name!r}"
+            raise ValueError(msg)
         self.name = name
         self.default = default
         self.type_ = type_
diff --git a/tests/units/test_environment.py b/tests/units/test_environment.py
index d3f93165957..50f0ad7e341 100644
--- a/tests/units/test_environment.py
+++ b/tests/units/test_environment.py
@@ -437,6 +437,29 @@ def test_set_list_value(self):
         del os.environ["TEST_VAR"]
 
 
+@pytest.mark.parametrize(
+    "name", ["test_var", "Test_Var", "tEST_VAR", "reflex_use_npm"]
+)
+def test_env_var_name_not_uppercase_raises(name):
+    """Test that a non-uppercase environment variable name is rejected.
+
+    Args:
+        name: The invalid environment variable name.
+    """
+    with pytest.raises(ValueError, match="must be uppercase"):
+        EnvVar(name, "default", str)
+
+
+@pytest.mark.parametrize("name", ["TEST_VAR", "__INTERNAL_VAR", "VAR_2"])
+def test_env_var_name_uppercase_accepted(name):
+    """Test that fully uppercase environment variable names are accepted.
+
+    Args:
+        name: The valid environment variable name.
+    """
+    assert EnvVar(name, "default", str).name == name
+
+
 class TestEnvVarDescriptor:
     """Test the env_var descriptor."""
 

From 5844415212fa85453e80fdab2759565758db10c6 Mon Sep 17 00:00:00 2001
From: Benedikt Bartscher <bb@senbax.de>
Date: Mon, 27 Jul 2026 16:42:29 +0200
Subject: [PATCH 2/3] format

---
 tests/units/test_environment.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tests/units/test_environment.py b/tests/units/test_environment.py
index 50f0ad7e341..b5b477d5fcd 100644
--- a/tests/units/test_environment.py
+++ b/tests/units/test_environment.py
@@ -437,9 +437,7 @@ def test_set_list_value(self):
         del os.environ["TEST_VAR"]
 
 
-@pytest.mark.parametrize(
-    "name", ["test_var", "Test_Var", "tEST_VAR", "reflex_use_npm"]
-)
+@pytest.mark.parametrize("name", ["test_var", "Test_Var", "tEST_VAR", "reflex_use_npm"])
 def test_env_var_name_not_uppercase_raises(name):
     """Test that a non-uppercase environment variable name is rejected.
 

From 324697c75545a8ef9997d6e30e693cf269cafbc5 Mon Sep 17 00:00:00 2001
From: Benedikt Bartscher <bb@senbax.de>
Date: Tue, 4 Aug 2026 20:04:34 +0200
Subject: [PATCH 3/3] add changelog entry

---
 packages/reflex-base/news/6815.misc.md | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 packages/reflex-base/news/6815.misc.md

diff --git a/packages/reflex-base/news/6815.misc.md b/packages/reflex-base/news/6815.misc.md
new file mode 100644
index 00000000000..8b4552b6b2b
--- /dev/null
+++ b/packages/reflex-base/news/6815.misc.md
@@ -0,0 +1 @@
+Raise a `ValueError` when an `EnvVar` is declared with a name that is not fully uppercase, so misnamed environment variables are caught at definition time.