diff --git a/Tethering/apex/Android.bp b/Tethering/apex/Android.bp
index c99121cae7..7970944329 100644
--- a/Tethering/apex/Android.bp
+++ b/Tethering/apex/Android.bp
@@ -27,7 +27,10 @@ apex {
     jni_libs: [
         "libservice-connectivity",
     ],
-    bpfs: ["offload.o"],
+    bpfs: [
+        "offload.o",
+        "test.o",
+    ],
     apps: ["Tethering"],
     manifest: "manifest.json",
     key: "com.android.tethering.key",
diff --git a/Tethering/bpf_progs/Android.bp b/Tethering/bpf_progs/Android.bp
index d54f861486..d62e9a1b4c 100644
--- a/Tethering/bpf_progs/Android.bp
+++ b/Tethering/bpf_progs/Android.bp
@@ -31,3 +31,18 @@ bpf {
         "system/netd/libnetdutils/include",  // for UidConstants.h
     ],
 }
+
+bpf {
+    name: "test.o",
+    srcs: ["test.c"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    include_dirs: [
+        // TODO: get rid of system/netd.
+        "system/netd/bpf_progs",             // for bpf_net_helpers.h
+        "system/netd/libnetdbpf/include",    // for bpf_shared.h
+        "system/netd/libnetdutils/include",  // for UidConstants.h
+    ],
+}
diff --git a/Tethering/bpf_progs/offload.c b/Tethering/bpf_progs/offload.c
index d8dc60dc1a..cc5af3127b 100644
--- a/Tethering/bpf_progs/offload.c
+++ b/Tethering/bpf_progs/offload.c
@@ -34,10 +34,6 @@ DEFINE_BPF_MAP_GRW(tether_stats_map, HASH, uint32_t, TetherStatsValue, 16, AID_N
 // (tethering allowed when stats[iif].rxBytes + stats[iif].txBytes < limit[iif])
 DEFINE_BPF_MAP_GRW(tether_limit_map, HASH, uint32_t, uint64_t, 16, AID_NETWORK_STACK)
 
-// Used only by TetheringPrivilegedTests, not by production code.
-DEFINE_BPF_MAP_GRW(tether_ingress_map_TEST, HASH, TetherIngressKey, TetherIngressValue, 16,
-                   AID_NETWORK_STACK)
-
 static inline __always_inline int do_forward(struct __sk_buff* skb, bool is_ethernet) {
     int l2_header_size = is_ethernet ? sizeof(struct ethhdr) : 0;
     void* data = (void*)(long)skb->data;
diff --git a/Tethering/bpf_progs/test.c b/Tethering/bpf_progs/test.c
new file mode 100644
index 0000000000..b5be33f459
--- /dev/null
+++ b/Tethering/bpf_progs/test.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "bpf_helpers.h"
+#include "bpf_net_helpers.h"
+#include "netdbpf/bpf_shared.h"
+
+// Used only by TetheringPrivilegedTests, not by production code.
+DEFINE_BPF_MAP_GRW(tether_ingress_map, HASH, TetherIngressKey, TetherIngressValue, 16,
+                   AID_NETWORK_STACK)
+
+LICENSE("Apache 2.0");
diff --git a/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java b/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java
index 1ddbaa9a20..04c1f00064 100644
--- a/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java
+++ b/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java
@@ -52,7 +52,7 @@ public final class BpfMapTest {
     // Sync from packages/modules/Connectivity/Tethering/bpf_progs/offload.c.
     private static final int TEST_MAP_SIZE = 16;
     private static final String TETHER_INGRESS_FS_PATH =
-            "/sys/fs/bpf/map_offload_tether_ingress_map_TEST";
+            "/sys/fs/bpf/map_test_tether_ingress_map";
 
     private ArrayMap<TetherIngressKey, TetherIngressValue> mTestData;