diff --git a/test/testio.cpp b/test/testio.cpp
index 0f21343ff16..a314396ed71 100644
--- a/test/testio.cpp
+++ b/test/testio.cpp
@@ -836,6 +836,8 @@ class TestIO : public TestFixture {
         assertEquals(filename, linenr, emptyString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.platform = Platform::Type::Win32A, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, emptyString, errout_str());
+        check(code, dinit(CheckOptions, $.inconclusive = true, $.platform = Platform::Type::Win32W, $.onlyFormatStr = true, $.cpp = cpp));
+        assertEquals(filename, linenr, emptyString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.platform = Platform::Type::Win64, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, emptyString, errout_str());
     }
@@ -850,6 +852,8 @@ class TestIO : public TestFixture {
         assertEquals(filename, linenr, testScanfErrString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.platform = Platform::Type::Win32A, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, testScanfErrString, errout_str());
+        check(code, dinit(CheckOptions, $.inconclusive = true, $.platform = Platform::Type::Win32W, $.onlyFormatStr = true, $.cpp = cpp));
+        assertEquals(filename, linenr, testScanfErrString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.platform = Platform::Type::Win64, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, testScanfErrString, errout_str());
     }
@@ -864,6 +868,8 @@ class TestIO : public TestFixture {
         assertEquals(filename, linenr, testScanfErrAkaString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.portability = true, $.platform = Platform::Type::Win32A, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, testScanfErrAkaString, errout_str());
+        check(code, dinit(CheckOptions, $.inconclusive = true, $.portability = true, $.platform = Platform::Type::Win32W, $.onlyFormatStr = true, $.cpp = cpp));
+        assertEquals(filename, linenr, testScanfErrAkaString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.portability = true, $.platform = Platform::Type::Win64, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, testScanfErrAkaWin64String, errout_str());
     }
@@ -878,6 +884,8 @@ class TestIO : public TestFixture {
         assertEquals(filename, linenr, emptyString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.portability = true, $.platform = Platform::Type::Win32A, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, emptyString, errout_str());
+        check(code, dinit(CheckOptions, $.inconclusive = true, $.portability = true, $.platform = Platform::Type::Win32W, $.onlyFormatStr = true, $.cpp = cpp));
+        assertEquals(filename, linenr, emptyString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.portability = true, $.platform = Platform::Type::Win64, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, testScanfErrAkaWin64String, errout_str());
     }
@@ -892,6 +900,8 @@ class TestIO : public TestFixture {
         assertEquals(filename, linenr, testScanfErrAkaString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.portability = true, $.platform = Platform::Type::Win32A, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, testScanfErrAkaString, errout_str());
+        check(code, dinit(CheckOptions, $.inconclusive = true, $.portability = true, $.platform = Platform::Type::Win32W, $.onlyFormatStr = true, $.cpp = cpp));
+        assertEquals(filename, linenr, testScanfErrAkaString, errout_str());
         check(code, dinit(CheckOptions, $.inconclusive = true, $.portability = true, $.platform = Platform::Type::Win64, $.onlyFormatStr = true, $.cpp = cpp));
         assertEquals(filename, linenr, emptyString, errout_str());
     }
@@ -2152,6 +2162,8 @@ class TestIO : public TestFixture {
             ASSERT_EQUALS(result, errout_str());
             check(code, dinit(CheckOptions, $.portability = true, $.platform = Platform::Type::Win32A));
             ASSERT_EQUALS(result, errout_str());
+            check(code, dinit(CheckOptions, $.portability = true, $.platform = Platform::Type::Win32W));
+            ASSERT_EQUALS(result, errout_str());
             check(code, dinit(CheckOptions, $.portability = true, $.platform = Platform::Type::Win64));
             ASSERT_EQUALS(result_win64, errout_str());
         }