diff --git a/changelog.d/9771.misc b/changelog.d/9771.misc
new file mode 100644
index 0000000000..42d651d4cc
--- /dev/null
+++ b/changelog.d/9771.misc
@@ -0,0 +1 @@
+Enable Complement tests for [MSC2946](https://github.com/matrix-org/matrix-doc/pull/2946): Spaces Summary API.
diff --git a/scripts-dev/complement.sh b/scripts-dev/complement.sh
index b77187472f..1612ab522c 100755
--- a/scripts-dev/complement.sh
+++ b/scripts-dev/complement.sh
@@ -46,4 +46,4 @@ if [[ -n "$1" ]]; then
 fi
 
 # Run the tests!
-COMPLEMENT_BASE_IMAGE=complement-synapse go test -v -tags synapse_blacklist,msc3083 -count=1 $EXTRA_COMPLEMENT_ARGS ./tests
+COMPLEMENT_BASE_IMAGE=complement-synapse go test -v -tags synapse_blacklist,msc2946,msc3083 -count=1 $EXTRA_COMPLEMENT_ARGS ./tests