Index: test/std/input.output/file.streams/fstreams/ifstream.cons/pointer.pass.cpp
===================================================================
--- test/std/input.output/file.streams/fstreams/ifstream.cons/pointer.pass.cpp
+++ test/std/input.output/file.streams/fstreams/ifstream.cons/pointer.pass.cpp
@@ -27,9 +27,13 @@
     }
     {
         std::ifstream fs("test.dat", std::ios_base::out);
-        double x = 0;
-        fs >> x;
-        assert(x == 3.25);
+
+        if (fs) // "test.dat" might be read-only.
+        { // See also: test/std/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
+            double x = 0;
+            fs >> x;
+            assert(x == 3.25);
+        }
     }
     {
         std::wifstream fs("test.dat");
@@ -39,8 +43,12 @@
     }
     {
         std::wifstream fs("test.dat", std::ios_base::out);
-        double x = 0;
-        fs >> x;
-        assert(x == 3.25);
+
+        if (fs) // "test.dat" might be read-only.
+        { // See also: test/std/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
+            double x = 0;
+            fs >> x;
+            assert(x == 3.25);
+        }
     }
 }
Index: test/std/input.output/file.streams/fstreams/ifstream.cons/string.pass.cpp
===================================================================
--- test/std/input.output/file.streams/fstreams/ifstream.cons/string.pass.cpp
+++ test/std/input.output/file.streams/fstreams/ifstream.cons/string.pass.cpp
@@ -27,9 +27,13 @@
     }
     {
         std::ifstream fs(std::string("test.dat"), std::ios_base::out);
-        double x = 0;
-        fs >> x;
-        assert(x == 3.25);
+
+        if (fs) // "test.dat" might be read-only.
+        { // See also: test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
+            double x = 0;
+            fs >> x;
+            assert(x == 3.25);
+        }
     }
     {
         std::wifstream fs(std::string("test.dat"));
@@ -39,8 +43,12 @@
     }
     {
         std::wifstream fs(std::string("test.dat"), std::ios_base::out);
-        double x = 0;
-        fs >> x;
-        assert(x == 3.25);
+
+        if (fs) // "test.dat" might be read-only.
+        { // See also: test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
+            double x = 0;
+            fs >> x;
+            assert(x == 3.25);
+        }
     }
 }
Index: test/std/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
===================================================================
--- test/std/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
+++ test/std/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
@@ -31,6 +31,12 @@
         fs >> x;
         assert(x == 3.25);
     }
+    {
+        std::ifstream fs(temp.c_str(), std::ios_base::out);
+        double x = 0;
+        fs >> x;
+        assert(x == 3.25);
+    }
     std::remove(temp.c_str());
     {
         std::wofstream fs(temp.c_str());
@@ -42,5 +48,11 @@
         fs >> x;
         assert(x == 3.25);
     }
+    {
+        std::wifstream fs(temp.c_str(), std::ios_base::out);
+        double x = 0;
+        fs >> x;
+        assert(x == 3.25);
+    }
     std::remove(temp.c_str());
 }
Index: test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
===================================================================
--- test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
+++ test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
@@ -31,6 +31,12 @@
         fs >> x;
         assert(x == 3.25);
     }
+    {
+        std::ifstream fs(temp, std::ios_base::out);
+        double x = 0;
+        fs >> x;
+        assert(x == 3.25);
+    }
     std::remove(temp.c_str());
     {
         std::wofstream fs(temp);
@@ -42,5 +48,11 @@
         fs >> x;
         assert(x == 3.25);
     }
+    {
+        std::wifstream fs(temp, std::ios_base::out);
+        double x = 0;
+        fs >> x;
+        assert(x == 3.25);
+    }
     std::remove(temp.c_str());
 }