diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 16d0847..016d224 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -104,6 +104,10 @@ jobs:
           mv siblings/rusty-testkit ../rusty-testkit
           mv siblings/rusty-ultraviolet ../rusty-ultraviolet
           mv siblings/rusty-x-ansi ../rusty-x-ansi
+      - name: Verify sibling dependency source identity
+        run: |
+          cargo tree --package rusty-bubbletea --invert rusty-colorprofile@0.4.3
+          cargo tree --package rusty-bubbletea --invert rusty-x-ansi@0.11.7
       - name: Format
         run: cargo fmt --all --check
       - name: Lint
diff --git a/Cargo.toml b/Cargo.toml
index ab15af6..2df8537 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,6 +26,12 @@ rusty-bubbles = { version = "2.1.0", path = "../rusty-bubbles" }
 [target.'cfg(unix)'.dev-dependencies]
 rusty-testkit = { version = "0.1.1", path = "../rusty-testkit" }
 
+[patch.crates-io]
+# Root patches are required because Cargo ignores patch sections declared by
+# dependencies such as rusty-ultraviolet. Keep every sibling edge on one source.
+rusty-colorprofile = { path = "../rusty-colorprofile" }
+rusty-x-ansi = { path = "../rusty-x-ansi" }
+
 [lib]
 name = "rusty_bubbletea"
 path = "src/lib.rs"
diff --git a/UPSTREAM_MAPPING.md b/UPSTREAM_MAPPING.md
index afe1e76..8af2b48 100644
--- a/UPSTREAM_MAPPING.md
+++ b/UPSTREAM_MAPPING.md
@@ -161,7 +161,7 @@ byte-for-byte.
 | `tutorials/basics/main.go` | `examples/tutorial_basics.rs` | Tutorial: counter; quits on 'q' |
 | `tutorials/commands/main.go` | `examples/tutorial_commands.rs` | Tutorial: commands; quits on 'q' |
 
-Rust-only portability regression coverage is maintained in `tests/windows_platform.rs`; it
+Rust-only portability regression coverage is maintained in `tests/windows_tty.rs`; it
 exercises the Windows raw-mode and terminal-restoration boundary that has no standalone
 upstream Go test file. The PTY-driven `tests/interactive.rs` suite remains Unix-gated because
 its real pseudo-terminal dependency is intentionally not claimed as native Windows support.
diff --git a/tests/interactive.rs b/tests/interactive.rs
index 2a4dd8a..546e80d 100644
--- a/tests/interactive.rs
+++ b/tests/interactive.rs
@@ -9,8 +9,6 @@
 //! interactive behavior (typing, navigating, mouse clicks) that a byte-level
 //! key-sweep cannot.
 
-#![cfg(unix)]
-
 use rusty_testkit::PtySession;
 
 /// The package's Cargo target directory. `cargo metadata` is authoritative:
diff --git a/tests/windows_platform.rs b/tests/windows_platform.rs
deleted file mode 100644
index 9063f1f..0000000
--- a/tests/windows_platform.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-#![cfg(windows)]
-
-//! Windows regression coverage for the compile-safe terminal boundary.
-
-use rusty_bubbletea::tty::{disable_raw_mode, enable_raw_mode, init_terminal, restore_terminal};
-
-#[test]
-fn raw_mode_operations_are_safe_no_ops_on_windows() {
-    enable_raw_mode().expect("Windows raw-mode fallback should succeed");
-    disable_raw_mode().expect("Windows raw-mode restoration fallback should succeed");
-}
-
-#[test]
-fn terminal_lifecycle_uses_the_same_windows_boundary() {
-    init_terminal().expect("Windows terminal initialization fallback should succeed");
-    restore_terminal().expect("Windows terminal restoration fallback should succeed");
-}