diff --git a/ci/check-plugins-installed.py b/ci/check-plugins-installed.py
index 8284ace7..a334f138 100755
--- a/ci/check-plugins-installed.py
+++ b/ci/check-plugins-installed.py
@@ -5,8 +5,7 @@ import sys
 import os
 import glob
 
-DIRS = ['audio', 'generic', 'net', 'text', 'utils', 'video']
-OVERRIDE = {'wrap': 'textwrap', 'flavors': 'rsflv'}
+from utils import iterate_plugins
 
 prefix = sys.argv[1]
 
@@ -17,17 +16,12 @@ print("Built plugins:", plugins)
 
 success = True
 
-for d in DIRS:
-    for name in os.listdir(d):
-        name = OVERRIDE.get(name, name)
+for name in iterate_plugins():
+    plugin = "libgst{}.so".format(name)
 
-        plugin = "libgst{}.so".format(name)
-        # Some plugins are prefixed with 'rs'
-        rs_plugin = "libgstrs{}.so".format(name)
-
-        if plugin not in plugins and rs_plugin not in plugins:
-            print(name, "missing in", prefix)
-            success = False
+    if plugin not in plugins:
+        print(name, "missing in", prefix)
+        success = False
 
 if not success:
     sys.exit(1)
diff --git a/ci/utils.py b/ci/utils.py
new file mode 100644
index 00000000..a3ec3d1e
--- /dev/null
+++ b/ci/utils.py
@@ -0,0 +1,16 @@
+import os
+
+DIRS = ['audio', 'generic', 'net', 'text', 'utils', 'video']
+# Plugins whose name is prefixed by 'rs'
+RS_PREFIXED = ['audiofx', 'closedcaption', 'dav1d', 'file']
+OVERRIDE = {'wrap': 'rstextwrap', 'flavors': 'rsflv'}
+
+
+def iterate_plugins():
+    for d in DIRS:
+        for name in os.listdir(d):
+            if name in RS_PREFIXED:
+                name = "rs{}".format(name)
+            else:
+                name = OVERRIDE.get(name, name)
+            yield name