diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 96c8565..36c53f2 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,10 +21,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Print Tests
-        run: echo "matrix=$(ls -1 -d packages/* | grep -v gsl | tr '\n' '\0' | xargs -0 -n 1 basename | jq -Rsc '. / "\n" - [""]')"
+        run: echo "matrix=$(./test-list.sh | jq -Rsc '. / "\n" - [""]')"
       - name: List Tests As Output
         id: list-tests
-        run: echo "matrix=$(ls -1 -d packages/* | grep -v gsl | tr '\n' '\0' | xargs -0 -n 1 basename | jq -Rsc '. / "\n" - [""]')" >> $GITHUB_OUTPUT
+        run: echo "matrix=$(./test-list.sh | jq -Rsc '. / "\n" - [""]')" >> $GITHUB_OUTPUT
 
   test-package:
     name: ${{ matrix.stack }} on ${{ matrix.os }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7636a55..c603362 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,16 @@
+## October 31st 2023
+
+### Added
+ * Convention to mark packages as no longer officially supported. Packages with an `UNSUPPORTED` file
+   in their directory will not be subject to testing, but may still work for you, espeically if your
+   application uses an old version of the package.
+
+   Packages may be marked unsupported for a variety of reasons, but commonly because they have been
+   removed from CRAN.
+
+### Removed
+ * `rgdal` and `rgeos` is marked unsupported because they were removed from CRAN.
+
 ## September 22nd 2023
 
 ### Added
diff --git a/packages/rgdal/UNSUPPORTED b/packages/rgdal/UNSUPPORTED
new file mode 100644
index 0000000..4cd25af
--- /dev/null
+++ b/packages/rgdal/UNSUPPORTED
@@ -0,0 +1 @@
+Removed from cran
diff --git a/packages/rgeos/UNSUPPORTED b/packages/rgeos/UNSUPPORTED
new file mode 100644
index 0000000..4cd25af
--- /dev/null
+++ b/packages/rgeos/UNSUPPORTED
@@ -0,0 +1 @@
+Removed from cran
diff --git a/test b/test
index 91c58f9..afec5d3 100755
--- a/test
+++ b/test
@@ -24,7 +24,7 @@ DIR=`dirname $0`
 cd "${DIR}" || exit 1
 
 if [ $# -eq 0 ]; then
-    PACKAGES=$(ls -1 -d $DIR/packages/* | grep -v gsl | tr '\n' '\0' | xargs -0 -n 1 basename)
+    PACKAGES=$(./test-list.sh)
 else
     PACKAGES=$@
 fi
diff --git a/test-list.sh b/test-list.sh
new file mode 100755
index 0000000..92b8a14
--- /dev/null
+++ b/test-list.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# Lists packages that are supported and testable.
+all_packages=$(find packages/ -mindepth 1 -maxdepth 1 -type d)
+
+for package in ${all_packages}; do
+    if [ ! -f "${package}"/UNSUPPORTED ]; then
+        basename "${package}"
+    fi
+done