diff --git a/t/t1402-check-ref-format.sh b/t/t1402-check-ref-format.sh
index 710fccad363..1ae4d87c929 100755
--- a/t/t1402-check-ref-format.sh
+++ b/t/t1402-check-ref-format.sh
@@ -5,38 +5,40 @@ test_description='Test git check-ref-format'
 . ./test-lib.sh
 
 valid_ref() {
-	if test "$#" = 1
-	then
-		test_expect_success "ref name '$1' is valid" \
-			"git check-ref-format '$1'"
-	else
-		test_expect_success "ref name '$1' is valid with options $2" \
-			"git check-ref-format $2 '$1'"
-	fi
+	prereq=
+	case $1 in
+	[A-Z]*)
+		prereq=$1
+		shift
+	esac
+	test_expect_success $prereq "ref name '$1' is valid${2:+ with options $2}" "
+		git check-ref-format $2 '$1'
+	"
 }
 invalid_ref() {
-	if test "$#" = 1
-	then
-		test_expect_success "ref name '$1' is invalid" \
-			"test_must_fail git check-ref-format '$1'"
-	else
-		test_expect_success "ref name '$1' is invalid with options $2" \
-			"test_must_fail git check-ref-format $2 '$1'"
-	fi
+	prereq=
+	case $1 in
+	[A-Z]*)
+		prereq=$1
+		shift
+	esac
+	test_expect_success $prereq "ref name '$1' is invalid${2:+ with options $2}" "
+		test_must_fail git check-ref-format $2 '$1'
+	"
 }
 
 invalid_ref ''
-invalid_ref '/'
-invalid_ref '/' --allow-onelevel
-invalid_ref '/' --normalize
-invalid_ref '/' '--allow-onelevel --normalize'
+invalid_ref NOT_MINGW '/'
+invalid_ref NOT_MINGW '/' --allow-onelevel
+invalid_ref NOT_MINGW '/' --normalize
+invalid_ref NOT_MINGW '/' '--allow-onelevel --normalize'
 valid_ref 'foo/bar/baz'
 valid_ref 'foo/bar/baz' --normalize
 invalid_ref 'refs///heads/foo'
 valid_ref 'refs///heads/foo' --normalize
 invalid_ref 'heads/foo/'
-invalid_ref '/heads/foo'
-valid_ref '/heads/foo' --normalize
+invalid_ref NOT_MINGW '/heads/foo'
+valid_ref NOT_MINGW '/heads/foo' --normalize
 invalid_ref '///heads/foo'
 valid_ref '///heads/foo' --normalize
 invalid_ref './foo'
@@ -115,14 +117,14 @@ invalid_ref "$ref" --refspec-pattern
 invalid_ref "$ref" '--refspec-pattern --allow-onelevel'
 
 ref='/foo'
-invalid_ref "$ref"
-invalid_ref "$ref" --allow-onelevel
-invalid_ref "$ref" --refspec-pattern
-invalid_ref "$ref" '--refspec-pattern --allow-onelevel'
-invalid_ref "$ref" --normalize
-valid_ref "$ref" '--allow-onelevel --normalize'
-invalid_ref "$ref" '--refspec-pattern --normalize'
-valid_ref "$ref" '--refspec-pattern --allow-onelevel --normalize'
+invalid_ref NOT_MINGW "$ref"
+invalid_ref NOT_MINGW "$ref" --allow-onelevel
+invalid_ref NOT_MINGW "$ref" --refspec-pattern
+invalid_ref NOT_MINGW "$ref" '--refspec-pattern --allow-onelevel'
+invalid_ref NOT_MINGW "$ref" --normalize
+valid_ref NOT_MINGW "$ref" '--allow-onelevel --normalize'
+invalid_ref NOT_MINGW "$ref" '--refspec-pattern --normalize'
+valid_ref NOT_MINGW "$ref" '--refspec-pattern --allow-onelevel --normalize'
 
 test_expect_success "check-ref-format --branch @{-1}" '
 	T=$(git write-tree) &&
@@ -155,21 +157,35 @@ test_expect_success 'check-ref-format --branch from subdir' '
 '
 
 valid_ref_normalized() {
-	test_expect_success "ref name '$1' simplifies to '$2'" "
+	prereq=
+	case $1 in
+	[A-Z]*)
+		prereq=$1
+		shift
+	esac
+	test_expect_success $prereq "ref name '$1' simplifies to '$2'" "
 		refname=\$(git check-ref-format --normalize '$1') &&
-		test \"\$refname\" = '$2'"
+		test \"\$refname\" = '$2'
+	"
 }
 invalid_ref_normalized() {
-	test_expect_success "check-ref-format --normalize rejects '$1'" "
-		test_must_fail git check-ref-format --normalize '$1'"
+	prereq=
+	case $1 in
+	[A-Z]*)
+		prereq=$1
+		shift
+	esac
+	test_expect_success $prereq "check-ref-format --normalize rejects '$1'" "
+		test_must_fail git check-ref-format --normalize '$1'
+	"
 }
 
 valid_ref_normalized 'heads/foo' 'heads/foo'
 valid_ref_normalized 'refs///heads/foo' 'refs/heads/foo'
-valid_ref_normalized '/heads/foo' 'heads/foo'
+valid_ref_normalized NOT_MINGW '/heads/foo' 'heads/foo'
 valid_ref_normalized '///heads/foo' 'heads/foo'
 invalid_ref_normalized 'foo'
-invalid_ref_normalized '/foo'
+invalid_ref_normalized NOT_MINGW '/foo'
 invalid_ref_normalized 'heads/foo/../bar'
 invalid_ref_normalized 'heads/./foo'
 invalid_ref_normalized 'heads\foo'