diff --git a/src/cmd/go/testdata/script/test_devnull.txt b/src/cmd/go/testdata/script/test_devnull.txt
new file mode 100644
index 0000000000..c414e59ba3
--- /dev/null
+++ b/src/cmd/go/testdata/script/test_devnull.txt
@@ -0,0 +1,13 @@
+# go test -c -o NUL
+# should work (see golang.org/issue/28035).
+cd x
+go test -o=$devnull -c
+! exists x.test$exe
+
+-- x/x_test.go --
+package x_test
+import (
+    "testing"
+)
+func TestNUL(t *testing.T) {
+}
diff --git a/src/path/filepath/path_test.go b/src/path/filepath/path_test.go
index eddae4755b..3434ea2e6e 100644
--- a/src/path/filepath/path_test.go
+++ b/src/path/filepath/path_test.go
@@ -751,6 +751,11 @@ func TestIsAbs(t *testing.T) {
 		for _, test := range isabstests {
 			tests = append(tests, IsAbsTest{"c:" + test.path, test.isAbs})
 		}
+		// Test reserved names.
+		tests = append(tests, IsAbsTest{os.DevNull, true})
+		tests = append(tests, IsAbsTest{"NUL", true})
+		tests = append(tests, IsAbsTest{"nul", true})
+		tests = append(tests, IsAbsTest{"CON", true})
 	} else {
 		tests = isabstests
 	}
diff --git a/src/path/filepath/path_windows.go b/src/path/filepath/path_windows.go
index 6a144d9e0b..445c868e41 100644
--- a/src/path/filepath/path_windows.go
+++ b/src/path/filepath/path_windows.go
@@ -13,8 +13,34 @@ func isSlash(c uint8) bool {
 	return c == '\\' || c == '/'
 }
 
+// reservedNames lists reserved Windows names. Search for PRN in
+// https://docs.microsoft.com/en-us/windows/desktop/fileio/naming-a-file
+// for details.
+var reservedNames = []string{
+	"CON", "PRN", "AUX", "NUL",
+	"COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9",
+	"LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9",
+}
+
+// isReservedName returns true, if path is Windows reserved name.
+// See reservedNames for the full list.
+func isReservedName(path string) bool {
+	if len(path) == 0 {
+		return false
+	}
+	for _, reserved := range reservedNames {
+		if strings.EqualFold(path, reserved) {
+			return true
+		}
+	}
+	return false
+}
+
 // IsAbs reports whether the path is absolute.
 func IsAbs(path string) (b bool) {
+	if isReservedName(path) {
+		return true
+	}
 	l := volumeNameLen(path)
 	if l == 0 {
 		return false