diff --git a/cmd/ww/main.c b/cmd/ww/main.c
index d51314ae..f7102f22 100644
--- a/cmd/ww/main.c
+++ b/cmd/ww/main.c
@@ -32,6 +32,7 @@ static const char *usage =
 "    foo.ww          literal file\n"
 "    foo             search cwd, -I dirs, then $WW_LIB for foo.ww or foo/foo.ww\n"
 "    lib/foo         directory: build lib/foo/foo.ww\n"
+"    lib/...         every package under lib, recursively (test only)\n"
 "    .               build the cwd's <basename>.ww\n";
 
 static char *self_dir;	/* directory containing this binary */
@@ -1689,6 +1690,29 @@ do_test(int argc, char **argv)
 		fprintf(stderr, "ww test: -S needs -o\n");
 		return 2;
 	}
+	/* Go's ./... form: a trailing "..." element is a package-tree
+	 * request for the coordinator, never a literal path — recognized
+	 * before stat, with the directory-mode rejects. */
+	size_t tlen = strlen(target);
+	if (strcmp(target, "...") == 0 ||
+	    (tlen >= 4 && strcmp(target + tlen - 4, "/...") == 0)) {
+		if (outstem[0]) {
+			fprintf(stderr,
+			    "ww test: -c/-S/-o need a single test file\n");
+			return 2;
+		}
+		if (workdir[0]) {
+			fprintf(stderr,
+			    "ww test: -w needs a single test file\n");
+			return 2;
+		}
+		if (pattern) {
+			fprintf(stderr,
+			    "ww test: pattern needs a single test file\n");
+			return 2;
+		}
+		return exec_package_tests(argc, argv, src, NULL, 0);
+	}
 	struct stat st;
 	if (stat(target, &st) != 0) {
 		/* not a literal path — try module resolution and run as
diff --git a/docs/test-system-v2.md b/docs/test-system-v2.md
index bef7dd7b..de58c34a 100644
--- a/docs/test-system-v2.md
+++ b/docs/test-system-v2.md
@@ -188,7 +188,12 @@ and nonempty-version-constant assertions.
 `ww test` delegates directory package requests to the native package
 coordinator. The coordinator owns discovery, package grouping, same-package and
 external-package test composition, filtering, result aggregation, and its
-internal temporary workspace. With `-c`, it publishes each exact
+internal temporary workspace. A trailing `...` path element (`ww test lib/...`,
+Go's `./...` form) is recognized by both driver stages before path resolution
+and walks the tree rooted at the prefix: every subdirectory whose name does not
+begin with `.` or `_` is descended with the same lstat/no-symlink discipline,
+each test-bearing directory becomes one package run, and source-bearing
+directories without tests report the usual `?` line. With `-c`, it publishes each exact
 `<package>.test` binary and adjacent `<package>.test.sepwork` tree in the
 package directory; those become caller-owned artifacts. Without `-c`, it
 removes the temporary binary and scratch with its workspace. The language
@@ -306,7 +311,6 @@ timeout policy in this architecture.
 Carried over from the dissolved project plan; each is deliberate scope, not
 drift:
 
-- Recursive package discovery (a `./...`-equivalent pattern) for `ww test`.
 - Package-level concurrency for the coordinator's builds (it is
   single-threaded by design today).
 - A package-level `-o` contract (single-file `ww test -o` exists; directory
diff --git a/internal/wwpackage/package.ww b/internal/wwpackage/package.ww
index c0ed54cc..ada97e7e 100644
--- a/internal/wwpackage/package.ww
+++ b/internal/wwpackage/package.ww
@@ -88,7 +88,7 @@ fn pkgfailpath(path: str, reason: str) void = {
 
 fn pkgusage() void = {
 	let s: str = strings.concat(
-		"usage: wwtest package [-c] [-list] [-j N] [-I DIR] [-run|-filter GLOB] [-timeout-ms=N] [DIR] [-- GLOB ...]\n",
+		"usage: wwtest package [-c] [-list] [-j N] [-I DIR] [-run|-filter GLOB] [-timeout-ms=N] [DIR | DIR/...] [-- GLOB ...]\n",
 		"  *_test.ww is canonical; noncanonical files require an actual @test declaration\n",
 		"  -c retains the compiled package binaries; -j is reserved by sequential v1\n");
 	pkgput(os.STDERR_FILENO, s);
@@ -240,10 +240,12 @@ fn pkgkeepfile(name: str) bool = {
 	return true;
 };
 
-// The first vertical slice owns exactly one explicit package directory.  It
-// never recurses, and lstat is used both for the root and each candidate so a
-// symlink cannot be used to cross that boundary (including DT_UNKNOWN files).
-fn pkgdiscoverdir(path: str, st: *pkgdiscover) void = {
+// One explicit package directory; with recurse (the DIR/... form) every
+// subdirectory whose name does not begin with '.' or '_' is descended as
+// well, Go's ./... convention.  lstat is used for the root and each
+// candidate so a symlink cannot be used to cross the boundary (including
+// DT_UNKNOWN files); a symlinked subdirectory is skipped, not followed.
+fn pkgdiscoverdir(path: str, st: *pkgdiscover, recurse: bool) void = {
 	let rootstat: os.filestat;
 	match (os.lstat(&rootstat, path)) {
 	case void => void;
@@ -307,6 +309,22 @@ fn pkgdiscoverdir(path: str, st: *pkgdiscover) void = {
 					st.errors += 1;
 				};
 				};
+			} else if (recurse && name.len != 0
+				&& name[0] != '.' && name[0] != '_') {
+				let child: str = strings.concat(path, "/", name);
+				let fi: os.filestat;
+				match (os.lstat(&fi, child)) {
+				case void => {
+					if (pkgmodeis(fi.mode, os.mode.DIR)) {
+						pkgdiscoverdir(child, st, true);
+					};
+				};
+				case let e: os.oserror => {
+					pkgfailpath(child,
+						"cannot stat directory entry");
+					st.errors += 1;
+				};
+				};
 			};
 			off += reclen;
 		};
@@ -690,15 +708,28 @@ export fn packagecommand(args: []str) int = {
 			"wwtest package: -j is reserved; sequential package scheduling is active");
 	};
 
+	// Go's ./... form: a trailing "..." path element walks the tree
+	// rooted at the prefix instead of one explicit directory.
+	let discoverroot: str = roots[0];
+	let recurse: bool = false;
+	if (strings.compare(discoverroot, "...") == 0) {
+		discoverroot = ".";
+		recurse = true;
+	} else if (strings.hassuffix(discoverroot, "/...")) {
+		discoverroot = discoverroot[0:discoverroot.len - 4];
+		if (discoverroot.len == 0) { discoverroot = "/"; };
+		recurse = true;
+	};
+
 	let ds: pkgdiscover;
 	let discoveredpaths: []str = alloc([], 64u64)!;
 	ds.paths = discoveredpaths;
 	ds.errors = 0;
-	pkgdiscoverdir(roots[0], &ds);
+	pkgdiscoverdir(discoverroot, &ds, recurse);
 	if (ds.errors != 0) { return 1; };
 	pkgsort(ds.paths);
 	if (ds.paths.len == 0) {
-		pkgfailpath(roots[0], "directory contains no WW package sources");
+		pkgfailpath(discoverroot, "directory contains no WW package sources");
 		return 1;
 	};
 
diff --git a/selfhost/cmd/ww/main.ww b/selfhost/cmd/ww/main.ww
index 4bbcb8c2..57772a6d 100644
--- a/selfhost/cmd/ww/main.ww
+++ b/selfhost/cmd/ww/main.ww
@@ -2044,7 +2044,7 @@ fn resolvemodule(selfdir: *u8, name: *u8, incs: *u8, isdir: *i32) *u8 = {
 // ---- Subcommand handlers ----------------------------------------------
 
 fn writeusage(fd: i32) void = {
-	let s: str = "usage: ww [-V] <subcommand> [args...]\n  -V                print version and exit\n  build  [-S] [-w DIR] [-o FILE] [path] compile module; -S stops after package asm\n  run    [path] ... build then exec, passing extra args to the program\n  test   [-S -o STEM] [-w DIR] [options] [path] build/run tests; -S emits package asm\n  version           print version and exit\n\n  path forms:\n    foo.ww          literal file\n    foo             search cwd, -I dirs, then $WW_LIB-equiv for foo.ww or foo/foo.ww\n    lib/foo         directory: build lib/foo/foo.ww\n    .               build the cwd's <basename>.ww\n";
+	let s: str = "usage: ww [-V] <subcommand> [args...]\n  -V                print version and exit\n  build  [-S] [-w DIR] [-o FILE] [path] compile module; -S stops after package asm\n  run    [path] ... build then exec, passing extra args to the program\n  test   [-S -o STEM] [-w DIR] [options] [path] build/run tests; -S emits package asm\n  version           print version and exit\n\n  path forms:\n    foo.ww          literal file\n    foo             search cwd, -I dirs, then $WW_LIB-equiv for foo.ww or foo/foo.ww\n    lib/foo         directory: build lib/foo/foo.ww\n    lib/...         every package under lib, recursively (test only)\n    .               build the cwd's <basename>.ww\n";
 	os.write(fd, s.ptr, s.len: u64);
 };
 
@@ -2672,6 +2672,34 @@ fn dotest(selfdir: *u8, argv: **u8, argc: i32, start: i32) i32 = {
 		return 2;
 	};
 
+	// Go's ./... form: a trailing "..." element is a package-tree
+	// request for the coordinator, never a literal path — recognized
+	// before stat, with the directory-mode rejects.
+	let tlen: u64 = cstrlen(target);
+	let istree: bool = cstreqlit(target, "...");
+	if (!istree && tlen >= 4u64) {
+		istree = target[tlen - 4u64] == '/'
+			&& target[tlen - 3u64] == '.'
+			&& target[tlen - 2u64] == '.'
+			&& target[tlen - 1u64] == '.';
+	};
+	if (istree) {
+		if (outstem != nil) {
+			cerr("ww test: -c/-S/-o need a single test file\n");
+			return 2;
+		};
+		if (workdir != nil) {
+			cerr("ww test: -w needs a single test file\n");
+			return 2;
+		};
+		if (patarg != nil) {
+			cerr("ww test: pattern needs a single test file\n");
+			return 2;
+		};
+		return execpackagetests(selfdir, argv, argc, start,
+			targetindex, nil, false);
+	};
+
 	let resolved: *u8 = target;
 	let isdir: i32 = 0;
 	let found: bool = false;
diff --git a/test/package/package_test.ww b/test/package/package_test.ww
index 648aa196..66a1bcb4 100644
--- a/test/package/package_test.ww
+++ b/test/package/package_test.ww
@@ -443,6 +443,102 @@ fn packagepath(relative: str) str = {
 	clean(root);
 };
 
+// Go's ./... parity: a trailing "..." element walks the tree, one package
+// run per test-bearing directory, dot- and underscore-prefixed directory
+// names excluded. The excluded sentinels hold failing tests so a wrong
+// descent turns the whole run red rather than passing silently.
+@test fn recursive_tree_discovery() void = {
+	let root: str = fresh();
+	let tree: str = strings.concat(root, "/tree");
+	assert(os.mkdir(tree, 448i32) == 0);
+	assert(os.mkdir(strings.concat(tree, "/alpha"), 448i32) == 0);
+	assert(os.mkdir(strings.concat(tree, "/beta"), 448i32) == 0);
+	assert(os.mkdir(strings.concat(tree, "/beta/inner"), 448i32) == 0);
+	assert(os.mkdir(strings.concat(tree, "/gamma"), 448i32) == 0);
+	assert(os.mkdir(strings.concat(tree, "/.hidden"), 448i32) == 0);
+	assert(os.mkdir(strings.concat(tree, "/_skip"), 448i32) == 0);
+	writefile(strings.concat(tree, "/alpha/alpha.ww"),
+		"package alpha;\nexport fn value() int = { return 7; };\n");
+	writefile(strings.concat(tree, "/alpha/alpha_test.ww"),
+		"package alpha_test;\nimport alpha;\n@test fn treealpha() void = { assert(alpha.value() == 7); };\n");
+	writefile(strings.concat(tree, "/beta/inner/inner_test.ww"),
+		"package inner;\n@test fn treeinner() void = { assert(1 == 1); };\n");
+	writefile(strings.concat(tree, "/gamma/gamma.ww"),
+		"package gamma;\nexport fn g() int = { return 1; };\n");
+	writefile(strings.concat(tree, "/.hidden/hid_test.ww"),
+		"package hid;\n@test fn hidden() void = { assert(false); };\n");
+	writefile(strings.concat(tree, "/_skip/skip_test.ww"),
+		"package skip;\n@test fn skipped() void = { assert(false); };\n");
+
+	let spec: str = strings.concat(tree, "/...");
+	let outc: commandout;
+	let outw: commandout;
+	let treec: []str = [driver("ww"), "test", spec];
+	let treew: []str = [driver("ww_ww"), "test", spec];
+	runcommand(root, "tree-c", treec,
+		(30i64 * (time.second: i64)): time.duration, &outc);
+	runcommand(root, "tree-ww", treew,
+		(30i64 * (time.second: i64)): time.duration, &outw);
+	expectexit(&outc, 0);
+	expectexit(&outw, 0);
+	assert(same(outc.stdout, outw.stdout));
+	assert(same(outc.stderr, outw.stderr));
+	assert(has(outc.stdout, strings.concat("ok   ", tree,
+		"/alpha [alpha_test, external]\n")));
+	assert(has(outc.stdout, strings.concat("ok   ", tree,
+		"/beta/inner [inner, same-package]\n")));
+	assert(has(outc.stdout, strings.concat("?    ", tree,
+		"/gamma [no tests]\n")));
+	assert(!has(outc.stdout, ".hidden"));
+	assert(!has(outc.stdout, "_skip"));
+
+	let patc: []str = [driver("ww"), "test", spec, "glob*"];
+	let patw: []str = [driver("ww_ww"), "test", spec, "glob*"];
+	runcommand(root, "tree-pattern-c", patc, time.second, &outc);
+	runcommand(root, "tree-pattern-ww", patw, time.second, &outw);
+	expectexit(&outc, 2);
+	expectexit(&outw, 2);
+	assert(same(outc.stderr, outw.stderr));
+	assert(has(outc.stderr, "ww test: pattern needs a single test file\n"));
+
+	let oc: []str = [driver("ww"), "test", "-o",
+		strings.concat(root, "/stem"), spec];
+	let ow: []str = [driver("ww_ww"), "test", "-o",
+		strings.concat(root, "/stem"), spec];
+	runcommand(root, "tree-o-c", oc, time.second, &outc);
+	runcommand(root, "tree-o-ww", ow, time.second, &outw);
+	expectexit(&outc, 2);
+	expectexit(&outw, 2);
+	assert(same(outc.stderr, outw.stderr));
+	assert(has(outc.stderr, "ww test: -c/-S/-o need a single test file\n"));
+
+	let wdc: []str = [driver("ww"), "test", "-w", root, spec];
+	let wdw: []str = [driver("ww_ww"), "test", "-w", root, spec];
+	runcommand(root, "tree-w-c", wdc, time.second, &outc);
+	runcommand(root, "tree-w-ww", wdw, time.second, &outw);
+	expectexit(&outc, 2);
+	expectexit(&outw, 2);
+	assert(same(outc.stderr, outw.stderr));
+	assert(has(outc.stderr, "ww test: -w needs a single test file\n"));
+
+	let bare: str = strings.concat(root, "/bare");
+	assert(os.mkdir(bare, 448i32) == 0);
+	assert(os.mkdir(strings.concat(bare, "/sub"), 448i32) == 0);
+	let barec: []str = [driver("ww"), "test",
+		strings.concat(bare, "/...")];
+	let barew: []str = [driver("ww_ww"), "test",
+		strings.concat(bare, "/...")];
+	runcommand(root, "tree-bare-c", barec,
+		(10i64 * (time.second: i64)): time.duration, &outc);
+	runcommand(root, "tree-bare-ww", barew,
+		(10i64 * (time.second: i64)): time.duration, &outw);
+	expectexit(&outc, 1);
+	expectexit(&outw, 1);
+	assert(same(outc.stderr, outw.stderr));
+	assert(has(outc.stderr, "directory contains no WW package sources\n"));
+	clean(root);
+};
+
 fn runtimepath(relative: str) str = {
 	return strings.concat(repo(), "/test/package/runtime/", relative);
 };