diff --git a/master/custom/builders.py b/master/custom/builders.py
index deb66c58..3a7d1339 100644
--- a/master/custom/builders.py
+++ b/master/custom/builders.py
@@ -22,6 +22,7 @@
     ClangUbsanFunctionLinuxBuild,
     ClangUnixInstalledBuild,
     SharedUnixBuild,
+    SlowDebugUnixBuild,
     SlowNonDebugUnixBuild,
     SlowUnixInstalledBuild,
     NonDebugUnixBuild,
@@ -309,6 +310,9 @@
 
     # Emscripten
     ("WASM Emscripten", "rkm-emscripten", EmscriptenBuild),
+
+    # Linux aarch64 GCC/Clang
+    ("ARM64 Raspbian Debug", "savannah-raspbian", SlowDebugUnixBuild),
 ]
 
 
diff --git a/master/custom/factories.py b/master/custom/factories.py
index 6d62958f..fba5259b 100644
--- a/master/custom/factories.py
+++ b/master/custom/factories.py
@@ -377,6 +377,11 @@ class SlowNonDebugUnixBuild(NonDebugUnixBuild):
     testFlags = [*NonDebugUnixBuild.testFlags, "-u-cpu"]
 
 
+class SlowDebugUnixBuild(UnixBuild):
+    test_timeout = SLOW_TIMEOUT
+    testFlags = [*UnixBuild.testFlags, "-u-cpu"]
+
+
 class SlowUnixInstalledBuild(UnixInstalledBuild):
     test_timeout = SLOW_TIMEOUT
 
diff --git a/master/custom/workers.py b/master/custom/workers.py
index b058aa70..ab02ba66 100644
--- a/master/custom/workers.py
+++ b/master/custom/workers.py
@@ -191,6 +191,12 @@ def get_workers(settings):
             # Tests fail with latin1 encoding on 3.12, probably earlier
             not_branches=['3.12', '3.11', '3.10', '3.9']
         ),
+        cpw(
+            name="savannah-raspbian",
+            tags=['linux', 'unix', 'raspbian', 'debian', 'armv8',
+                  'aarch64', 'arm'],
+            parallel_tests=4,
+        ),
         cpw(
             name="kulikjak-solaris-sparcv9",
             tags=['solaris', 'unix', 'sparc', 'sparcv9'],