diff --git a/noxfile.py b/noxfile.py
index 050b3a754..5fb9c4e55 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -527,7 +527,7 @@ def coverage_report(session: nox.Session):
     Both are single-line, CI-parseable summary strings.
     """
     session.install("-e", ".[tests]")
-    # _install_behave_parallel(session)
+    _install_behave_parallel(session)
 
     os.makedirs("build", exist_ok=True)
 
@@ -556,17 +556,17 @@ def coverage_report(session: nox.Session):
     )
 
     # Force sequential mode so slipcover wraps the entire process.
-    # session.env["BEHAVE_PARALLEL_COVERAGE"] = "1"
+    session.env["BEHAVE_PARALLEL_COVERAGE"] = "1"
 
     # Clean up any existing slipcover data
     for path in Path("build").glob(".slipcover.*.json"):
         path.unlink()
 
     # Build behave-parallel args (sequential for coverage).
-    # behave_cmd = session.bin + "/behave-parallel"
+    behave_cmd = session.bin + "/behave-parallel"
     if session.posargs and session.posargs[0].endswith(".feature"):
         behave_args = [
-            "behave",
+            behave_cmd,
             "-q",
             "--tags=not @skip",
             "--no-capture",
@@ -574,7 +574,7 @@ def coverage_report(session: nox.Session):
         ]
     else:
         behave_args = [
-            "behave",
+            behave_cmd,
             "-q",
             "--tags=not @skip",
             "--no-capture",