diff --git a/scripts/setup-rootfs.sh b/scripts/setup-rootfs.sh
index 587f83c1..f6b47fc7 100755
--- a/scripts/setup-rootfs.sh
+++ b/scripts/setup-rootfs.sh
@@ -115,6 +115,7 @@ map=(
     ["test-modinfo/mod-simple-pkcs7.ko"]="mod-simple.ko"
     ["test-modinfo/external/lib/modules/external/mod-simple.ko"]="mod-simple.ko"
     ["test-modinfo/fallback$MODULE_FALLBACK_DIRECTORY/4.4.4/kernel/"]="mod-simple.ko"
+    ["test-modinfo/fallback-custom$MODULE_FALLBACK_DIRECTORY/3.3.3/kernel/"]="mod-simple.ko"
     ["test-weakdep$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
     ["test-weakdep$MODULE_DIRECTORY/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
     ["test-weakdep$MODULE_DIRECTORY/4.4.4/kernel/mod-simple.ko"]="mod-simple.ko"
diff --git a/testsuite/rootfs-pristine/test-modinfo/correct-fallback-custom.txt b/testsuite/rootfs-pristine/test-modinfo/correct-fallback-custom.txt
new file mode 100644
index 00000000..92d85ff0
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modinfo/correct-fallback-custom.txt
@@ -0,0 +1 @@
+/run/modules/3.3.3/kernel/mod-simple.ko
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/proc/modules b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/proc/modules
new file mode 100644
index 00000000..e69de29b
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.alias b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.alias
new file mode 100644
index 00000000..ba76e181
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.alias
@@ -0,0 +1 @@
+# Aliases extracted from modules themselves.
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.alias.bin b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.alias.bin
new file mode 100644
index 00000000..7075435f
Binary files /dev/null and b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.alias.bin differ
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.builtin.bin b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.builtin.bin
new file mode 100644
index 00000000..e69de29b
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.dep b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.dep
new file mode 100644
index 00000000..54766537
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.dep
@@ -0,0 +1 @@
+kernel/mod-simple.ko:
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.dep.bin b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.dep.bin
new file mode 100644
index 00000000..b09a8543
Binary files /dev/null and b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.dep.bin differ
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.devname b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.devname
new file mode 100644
index 00000000..58f6d6d6
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.devname
@@ -0,0 +1 @@
+# Device nodes to trigger on-demand module loading.
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.softdep b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.softdep
new file mode 100644
index 00000000..5554ccca
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.softdep
@@ -0,0 +1 @@
+# Soft dependencies extracted from modules themselves.
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.symbols b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.symbols
new file mode 100644
index 00000000..618c345f
--- /dev/null
+++ b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.symbols
@@ -0,0 +1 @@
+# Aliases for symbols, used by symbol_request().
diff --git a/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.symbols.bin b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.symbols.bin
new file mode 100644
index 00000000..7075435f
Binary files /dev/null and b/testsuite/rootfs-pristine/test-modinfo/fallback-custom/run/modules/3.3.3/modules.symbols.bin differ
diff --git a/testsuite/test-modinfo.c b/testsuite/test-modinfo.c
index d1c3f59e..f4c5b4b4 100644
--- a/testsuite/test-modinfo.c
+++ b/testsuite/test-modinfo.c
@@ -147,5 +147,30 @@ DEFINE_TEST(test_modinfo_fallback,
 		.out = TESTSUITE_ROOTFS "test-modinfo/correct-fallback.txt",
 	})
 
+static noreturn int test_modinfo_fallback_custom(const struct test *t)
+{
+	const char *const args[] = {
+		// clang-format off
+		progname,
+		"-F", "filename",
+		"--set-version",
+		"3.3.3",
+		"mod-simple",
+		NULL,
+		// clang-format on
+	};
+	test_spawn_prog(progname, args);
+	exit(EXIT_FAILURE);
+}
+DEFINE_TEST(test_modinfo_fallback_custom,
+	.description = "check if modinfo finds external module",
+	.config = {
+		[TC_ROOTFS] = TESTSUITE_ROOTFS "test-modinfo/fallback-custom",
+		[TC_UNAME_R] = "4.4.4",
+	},
+	.output = {
+		.out = TESTSUITE_ROOTFS "test-modinfo/correct-fallback-custom.txt",
+	})
+
 
 TESTSUITE_MAIN();