diff --git a/easybuild/tools/modules.py b/easybuild/tools/modules.py
index 7de55a58fd..513d102d68 100644
--- a/easybuild/tools/modules.py
+++ b/easybuild/tools/modules.py
@@ -1790,7 +1790,9 @@ def __init__(self, *args, **kwargs):
         self.supports_tcl_getenv = True
         self.supports_tcl_check_group = version >= LooseVersion(self.REQ_VERSION_TCL_CHECK_GROUP)
         self.supports_safe_auto_load = True
-        self.supports_extensions = True
+        # Environment Modules should support "informational extension" to safely handle the
+        # extensions built here (see https://github.com/envmodules/modules/issues/585)
+        self.supports_extensions = False
 
     def check_module_function(self, allow_mismatch=False, regex=None):
         """Check whether selected module tool matches 'module' function definition."""
diff --git a/test/framework/module_generator.py b/test/framework/module_generator.py
index 0dba037d17..4669cf6888 100644
--- a/test/framework/module_generator.py
+++ b/test/framework/module_generator.py
@@ -794,6 +794,10 @@ def append_paths(*args, **kwargs):
 
     def test_module_extensions(self):
         """test the extensions() for extensions"""
+        # not supported by Environment Modules for the moment
+        if isinstance(self.modtool, EnvironmentModules):
+            return
+
         # check if extensions option is enabled and some module extensions are defined
         init_config(build_options={'module_extensions': True})