diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cf38c16d2254c11d3b731135559205b73f5c1a5c..dc1b3242aed3cc66d788e3e97da41a62152819b4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -26,7 +26,7 @@ test:
     - desktop-file-validate source/data/*.desktop
     - find source/locales/ | tr "\n" " " | grep -vq \.mo
     - make --directory=source/ flatpak
-    - flatpak run --filesystem=$CI_PROJECT_DIR/source/tests/:ro --command=source/tests/tests.py --env=LOG_LEVELS=ERRO ${APP_ID}
+    - flatpak run --filesystem=$CI_PROJECT_DIR/source/tests/:ro --command=source/tests/tests.py --env=MONOPHONY_LOG_LEVELS=ERRO ${APP_ID}
 
 
 .build:
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1cc4900ee91805658bbaa7c3c38109c017a1326f..e434e4309e131864f83fe6f77e30347fb91625be 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -5,8 +5,8 @@ Before making any changes, make sure that your editor supports [EditorConfig](ht
 ## Debugging
 
 The following environment variables are available:
-- `DEBUG`: Print memory information to help with finding leaks (unset by default)
-- `LOG_LEVELS`: Only print log messages of specified levels (`INFO,WARN,ERRO` by default)
+- `MONOPHONY_DEBUG`: Print memory information to help with finding leaks (unset by default)
+- `MONOPHONY_LOG_LEVELS`: Only print log messages of specified levels (`INFO,WARN,ERRO` by default)
 
 When running the app, environment variables can be set with `--env`:
 
diff --git a/source/monophony/debug.py b/source/monophony/debug.py
index 9926d7c814681b243d25aafd276c6d29d0924a65..a302368ad06ed69c43091bbe06f4113e91e97715 100644
--- a/source/monophony/debug.py
+++ b/source/monophony/debug.py
@@ -6,7 +6,7 @@ from monophony import logging
 from gi.repository import GLib, GObject
 
 
-_DEBUG_VARIABLE = 'DEBUG'
+_DEBUG_VARIABLE = 'MONOPHONY_DEBUG'
 
 
 def is_active() -> bool:
diff --git a/source/monophony/logging.py b/source/monophony/logging.py
index 925da2745f63e26120834ead21e2c42c12068588..72ec4839920595a1dd0ec581870c275eac862502 100644
--- a/source/monophony/logging.py
+++ b/source/monophony/logging.py
@@ -11,7 +11,7 @@ from monophony import NAME, __version__
 from gi.repository import GLib
 
 
-_LOG_LEVELS_VARIABLE = 'LOG_LEVELS'
+_LOG_LEVELS_VARIABLE = 'MONOPHONY_LOG_LEVELS'
 _DEFAULT_LOG_LEVELS = 'INFO,WARN,ERRO'