diff --git a/core/libs/prx/libSceImeDialog/CMakeLists.txt b/core/libs/prx/libSceImeDialog/CMakeLists.txt
index ff54ade840..8ac269fce2 100644
--- a/core/libs/prx/libSceImeDialog/CMakeLists.txt
+++ b/core/libs/prx/libSceImeDialog/CMakeLists.txt
@@ -32,4 +32,14 @@ if(BUILD_TESTING)
         set_tests_properties(guest_ime_dialog_composition PROPERTIES ENVIRONMENT_MODIFICATION
             "PATH=path_list_prepend:$<TARGET_FILE_DIR:libSceImeDialog>")
     endif()
+
+    add_test_executable(guest_ime_dialog_paste_tests ${LIBS_INCLUDE_DIR}/tests/GuestImeDialogPaste.cpp)
+    target_include_directories(guest_ime_dialog_paste_tests PRIVATE ${LIBS_INCLUDE_DIR})
+    target_link_libraries(guest_ime_dialog_paste_tests PRIVATE libSceImeDialog libSceIme libc)
+    configure_windows_unwind(guest_ime_dialog_paste_tests)
+    add_test(NAME guest_ime_dialog_paste COMMAND guest_ime_dialog_paste_tests)
+    if(WIN32)
+        set_tests_properties(guest_ime_dialog_paste PROPERTIES ENVIRONMENT_MODIFICATION
+            "PATH=path_list_prepend:$<TARGET_FILE_DIR:libSceImeDialog>")
+    endif()
 endif()
diff --git a/core/libs/tests/GuestImeDialogPaste.cpp b/core/libs/tests/GuestImeDialogPaste.cpp
new file mode 100644
index 0000000000..7c62866e04
--- /dev/null
+++ b/core/libs/tests/GuestImeDialogPaste.cpp
@@ -0,0 +1,158 @@
+#include "prx/libSceImeDialog/include/Api.hpp"
+#include "SceTypes.hpp"
+#include "prx/libSceIme/include/ImeInput.hpp"
+#include "prx/libSceIme/include/ImeKeyboardView.hpp"
+
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <string>
+
+namespace {
+
+constexpr int StatusRunning = 1;
+
+void Require(bool value, const char* message) {
+    if (value) return;
+    std::fprintf(stderr, "%s\n", message);
+    std::abort();
+}
+
+void Paste(const std::string& utf8) {
+    ImePublishPaste_nid_postfix(utf8.data(), utf8.size());
+}
+
+void Publish(ImeHostInputKind kind, const char* text = "", std::int32_t start = 0, std::int32_t length = 0) {
+    ImeHostInput input{};
+    input.kind = kind;
+    std::strncpy(input.text, text, sizeof(input.text) - 1);
+    input.start = start;
+    input.length = length;
+    ImePublishInput_nid_postfix(input);
+}
+
+Param DialogParam(char16_t* buffer, std::uint32_t maxLength) {
+    Param param{};
+    param.max_text_length = maxLength;
+    param.input_text_buffer = buffer;
+    return param;
+}
+
+ImeKeyboardView View() {
+    ImeKeyboardView view;
+    Require(ImeReadKeyboardView_nid_postfix(view), "the dialog shows no keyboard");
+    return view;
+}
+
+void Open(const Param& param) {
+    Require(sceImeDialogInit(&param, nullptr) == 0, "init");
+    Require(sceImeDialogGetStatus() == StatusRunning, "not running");
+}
+
+void Close() {
+    Require(sceImeDialogTerm() == 0, "term");
+}
+
+void CheckInsertAtCaret() {
+    char16_t buffer[16] = u"ab";
+    const Param param = DialogParam(buffer, 8);
+    Open(param);
+    Publish(ImeHostInputKind::Left);
+    Paste("XY");
+    auto view = View();
+    Require(view.text == u"aXYb" && view.caret == 3, "a paste lands at the caret and moves it");
+    Require(std::u16string(buffer) == u"ab", "a paste reached the buffer before the dialog was accepted");
+    Close();
+}
+
+void CheckLineBreaksAndControls() {
+    char16_t buffer[16] = u"";
+    const Param param = DialogParam(buffer, 16);
+    Open(param);
+    Paste(std::string("a\r\nb\nc\td\x01" "e\x7f" "f", 13));
+    Require(View().text == u"abcdef", "line breaks and controls are not removed from a paste");
+    Close();
+}
+
+void CheckMaxLength() {
+    char16_t buffer[16] = u"abc";
+    const Param param = DialogParam(buffer, 5);
+    Open(param);
+    Paste("d\xf0\x9f\x98\x80");
+    Require(View().text == u"abcd", "a paste split a surrogate pair at the limit");
+    Paste("ef");
+    Require(View().text == u"abcde", "a paste went past the maximum length");
+    Paste("g");
+    Require(View().text == u"abcde", "a paste into a full dialog changed it");
+    Close();
+
+    char16_t wide[16] = u"";
+    const Param roomForPair = DialogParam(wide, 4);
+    Open(roomForPair);
+    Paste("x\xf0\x9f\x98\x80\xf0\x9f\x98\x80");
+    Require(View().text == u"x\U0001F600", "a pair that fits is not kept whole");
+    Close();
+}
+
+void CheckHugeClipboard() {
+    char16_t buffer[2049] = u"";
+    const Param param = DialogParam(buffer, 2048);
+    Open(param);
+    const std::string huge(8u * 1024u * 1024u, 'x');
+    Paste(huge);
+    Require(View().text.size() == 2048, "a huge clipboard did not fill the dialog to its limit exactly");
+    Close();
+}
+
+void CheckInvalidUtf8() {
+    char16_t buffer[16] = u"";
+    const Param param = DialogParam(buffer, 16);
+    Open(param);
+    Paste("a\xff" "b\xe3\x81");
+    Require(View().text == u"a\uFFFDb\uFFFD", "an invalid clipboard is not replaced");
+    Close();
+}
+
+void CheckNothingCaptured() {
+    Require(!ImeCapturesKeyboard_nid_postfix(), "something is capturing");
+    Paste("ignored");
+    char16_t buffer[16] = u"";
+    const Param param = DialogParam(buffer, 16);
+    Open(param);
+    Require(View().text.empty(), "a paste before init was kept");
+    Close();
+    Paste("ignored");
+    Open(param);
+    Require(View().text.empty(), "a paste after term was kept");
+    Require(sceImeDialogAbort() == 0, "abort");
+    Paste("ignored");
+    ImeKeyboardView view;
+    Require(!ImeReadKeyboardView_nid_postfix(view), "a finished dialog shows a keyboard");
+    Close();
+}
+
+void CheckPasteWhileComposing() {
+    char16_t buffer[16] = u"ab";
+    const Param param = DialogParam(buffer, 16);
+    Open(param);
+    Publish(ImeHostInputKind::Preedit, "ni", 2, 0);
+    Paste("XY");
+    Require(View().text == u"ab", "a paste went in while a composition was shown");
+    Publish(ImeHostInputKind::Preedit, "");
+    Paste("XY");
+    Require(View().text == u"abXY", "a paste does not work once the composition ends");
+    Close();
+}
+
+}
+
+int main() {
+    CheckNothingCaptured();
+    CheckInsertAtCaret();
+    CheckLineBreaksAndControls();
+    CheckMaxLength();
+    CheckHugeClipboard();
+    CheckInvalidUtf8();
+    CheckPasteWhileComposing();
+}