diff --git a/test/wcc/781_fmt_vstream_compositions_run.c b/test/wcc/781_fmt_vstream_compositions_run.c
index 72d7382e..45e4bd0c 100644
--- a/test/wcc/781_fmt_vstream_compositions_run.c
+++ b/test/wcc/781_fmt_vstream_compositions_run.c
@@ -19,17 +19,29 @@
  *
  *   row                       | what it pins
  *   --------------------------+--------------------------------------
- *   fdprintln_v_run_basic     | vfprintln through an fd_ctx vstream
- *                             | (via fdprintln_v's wired vstream sink
- *                             | dispatching vfprint then vputbytes
- *                             | "\n"). One i64 arg + str arg + bool
- *                             | arg; asserts space-separator plus
- *                             | trailing newline byte content.
- *   fdprintfln_v_run_fmt      | vfprintfln through fd_ctx vstream
- *                             | with a {n}-placeholder format string.
+ *   fdprintln_v_run_basic     | fdprintln_v wired vstream sink
+ *                             | (inline vfprint + vputbytes "\n").
+ *                             | One i64 arg + str arg + bool arg;
+ *                             | asserts space-separator plus trailing
+ *                             | newline byte content.
+ *   fdprintfln_v_run_fmt      | fdprintfln_v wired vstream sink with
+ *                             | a {n}-placeholder format string.
  *                             | Asserts placeholder substitution +
  *                             | trailing newline shape (mirror of
  *                             | fmt.fprintfln, fmt.ww:740).
+ *   vfprintln_basic           | fmt.vfprintln dispatched DIRECTLY
+ *                             | through memio.fixed_vstream + read
+ *                             | back via memio.fixed_string. Pins
+ *                             | the new V-side composition symbol
+ *                             | itself (fdprintln_v open-codes the
+ *                             | same vfprint+vputbytes chain rather
+ *                             | than calling vfprintln, so without
+ *                             | this row the new symbol ships
+ *                             | uncovered).
+ *   vfprintfln_basic          | fmt.vfprintfln direct dispatch via
+ *                             | memio.fixed_vstream + fixed_string,
+ *                             | same direct-symbol rationale as
+ *                             | vfprintln_basic.
  *   bsprintf_v_basic          | vbsprintf into a caller-supplied
  *                             | [16]u8 buffer through
  *                             | memio.fixed_vstream;
@@ -170,6 +182,66 @@ static const struct row rows[] = {
 	  "};\n",
 	  61,
 	  STAGE_CS, 0 },
+	{ "vfprintln_basic",
+	  "package main;\n"
+	  "import os;\n"
+	  "import fmt;\n"
+	  "import io;\n"
+	  "import memio;\n"
+	  "export fn main() i32 = {\n"
+	  "    let buf: [16]u8;\n"
+	  "    let r: (io.vstream | nomem) = memio.fixed_vstream(buf[0:16]);\n"
+	  "    let vs: io.vstream = nil: *io.vtable;\n"
+	  "    match (r) {\n"
+	  "    case let v: io.vstream => { vs = v; };\n"
+	  "    case nomem => { return 90; };\n"
+	  "    };\n"
+	  "    let wr = fmt.vfprintln(vs, 1i64, \"hi\", true);\n"
+	  "    let nw: size = 0;\n"
+	  "    match (wr) {\n"
+	  "    case let n: size => { nw = n; };\n"
+	  "    case io.error => { return 91; };\n"
+	  "    };\n"
+	  "    if (nw != 10: size) { return 92; };\n"
+	  "    let view: str = memio.fixed_string(vs);\n"
+	  "    if (view.len != 10) { return 93; };\n"
+	  "    if (view[0] != 49u8) { return 94; };\n"
+	  "    if (view[1] != 32u8) { return 95; };\n"
+	  "    if (view[2] != 104u8 || view[3] != 105u8) { return 96; };\n"
+	  "    if (view[9] != 10u8) { return 97; };\n"
+	  "    return 64;\n"
+	  "};\n",
+	  64,
+	  STAGE_CS, 0 },
+	{ "vfprintfln_basic",
+	  "package main;\n"
+	  "import os;\n"
+	  "import fmt;\n"
+	  "import io;\n"
+	  "import memio;\n"
+	  "export fn main() i32 = {\n"
+	  "    let buf: [16]u8;\n"
+	  "    let r: (io.vstream | nomem) = memio.fixed_vstream(buf[0:16]);\n"
+	  "    let vs: io.vstream = nil: *io.vtable;\n"
+	  "    match (r) {\n"
+	  "    case let v: io.vstream => { vs = v; };\n"
+	  "    case nomem => { return 90; };\n"
+	  "    };\n"
+	  "    let wr = fmt.vfprintfln(vs, \"x={}\", 7i64);\n"
+	  "    let nw: size = 0;\n"
+	  "    match (wr) {\n"
+	  "    case let n: size => { nw = n; };\n"
+	  "    case io.error => { return 91; };\n"
+	  "    };\n"
+	  "    if (nw != 4: size) { return 92; };\n"
+	  "    let view: str = memio.fixed_string(vs);\n"
+	  "    if (view.len != 4) { return 93; };\n"
+	  "    if (view[0] != 120u8 || view[1] != 61u8) { return 94; };\n"
+	  "    if (view[2] != 55u8 || view[3] != 10u8) { return 95; };\n"
+	  "    return 65;\n"
+	  "};\n",
+	  65,
+	  STAGE_CS, 0 },
 	{ "bsprintf_v_basic",
 	  "package main;\n"
 	  "import os;\n"