diff --git a/tests/mts/bpf_existence_test.cpp b/tests/mts/bpf_existence_test.cpp
index 0c424e9..cff4d6f 100644
--- a/tests/mts/bpf_existence_test.cpp
+++ b/tests/mts/bpf_existence_test.cpp
@@ -40,6 +40,7 @@
 #define TETHERING "/sys/fs/bpf/tethering/"
 #define PRIVATE "/sys/fs/bpf/net_private/"
 #define SHARED "/sys/fs/bpf/net_shared/"
+#define NETD_RO "/sys/fs/bpf/netd_readonly/"
 #define NETD "/sys/fs/bpf/netd_shared/"
 
 class BpfExistenceTest : public ::testing::Test {
@@ -119,9 +120,9 @@
 };
 
 // Provided by *current* mainline module for T+ devices with 5.4+ kernels
-static const set<string> MAINLINE_FOR_T_5_4_PLUS = {
-    SHARED "prog_block_bind4_block_port",
-    SHARED "prog_block_bind6_block_port",
+static const set<string> MAINLINE_FOR_T_4_19_PLUS = {
+    NETD_RO "prog_block_bind4_block_port",
+    NETD_RO "prog_block_bind6_block_port",
 };
 
 // Provided by *current* mainline module for T+ devices with 5.15+ kernels
@@ -176,7 +177,7 @@
     // T still only requires Linux Kernel 4.9+.
     DO_EXPECT(IsAtLeastT(), MAINLINE_FOR_T_PLUS);
     DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(4, 14, 0), MAINLINE_FOR_T_4_14_PLUS);
-    DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(5, 4, 0), MAINLINE_FOR_T_5_4_PLUS);
+    DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(4, 19, 0), MAINLINE_FOR_T_4_19_PLUS);
     DO_EXPECT(IsAtLeastT() && isAtLeastKernelVersion(5, 15, 0), MAINLINE_FOR_T_5_15_PLUS);
 
     // U requires Linux Kernel 4.14+, but nothing (as yet) added or removed in U.