diff --git a/contrib/ci/Dockerfile-debian-experimental b/contrib/ci/Dockerfile-debian-experimental
index 95ae2d8af..cc6b79143 100644
--- a/contrib/ci/Dockerfile-debian-experimental
+++ b/contrib/ci/Dockerfile-debian-experimental
@@ -51,6 +51,6 @@ RUN apt-get -t experimental install -yq --no-install-recommends \
 	libappstream-glib-dev
 #deps needed only for installed tests
 RUN apt-get install -yq --no-install-recommends \
-        gnome-desktop-testing dbus-x11 ca-certificates
+        gnome-desktop-testing dbus-x11 ca-certificates python-gi
 RUN mkdir /build
 WORKDIR /build
diff --git a/contrib/ci/Dockerfile-debian-unstable b/contrib/ci/Dockerfile-debian-unstable
index 956ab31b4..d7bfbaa73 100644
--- a/contrib/ci/Dockerfile-debian-unstable
+++ b/contrib/ci/Dockerfile-debian-unstable
@@ -47,6 +47,6 @@ RUN apt-get install -yq --no-install-recommends \
 	valgrind
 #deps needed only for installed tests
 RUN apt-get install -yq --no-install-recommends \
-        gnome-desktop-testing dbus-x11 ca-certificates
+        gnome-desktop-testing dbus-x11 ca-certificates python-gi
 RUN mkdir /build
 WORKDIR /build