diff --git a/test/tools/llvm-cov/showHighlightedRanges.cpp b/test/tools/llvm-cov/showHighlightedRanges.cpp
index 7c38fff676b..ce64fdd00aa 100644
--- a/test/tools/llvm-cov/showHighlightedRanges.cpp
+++ b/test/tools/llvm-cov/showHighlightedRanges.cpp
@@ -43,3 +43,6 @@ int main() {
   func2(9);
   return 0;
 }
+
+// llvm-cov doesn't work on big endian yet
+// XFAIL: powerpc64-, s390x, mips-, mips64-, sparc
diff --git a/test/tools/llvm-cov/showLineExecutionCounts.cpp b/test/tools/llvm-cov/showLineExecutionCounts.cpp
index abcf5a33cd7..9c94344e5ee 100644
--- a/test/tools/llvm-cov/showLineExecutionCounts.cpp
+++ b/test/tools/llvm-cov/showLineExecutionCounts.cpp
@@ -20,3 +20,6 @@ int main() {                             // CHECK:   1| [[@LINE]]|int main(
                                          // CHECK:   1| [[@LINE]]|
   return 0;                              // CHECK:   1| [[@LINE]]|  return
 }                                        // CHECK:   1| [[@LINE]]|}
+
+// llvm-cov doesn't work on big endian yet
+// XFAIL: powerpc64-, s390x, mips-, mips64-, sparc
diff --git a/test/tools/llvm-cov/showRegionMarkers.cpp b/test/tools/llvm-cov/showRegionMarkers.cpp
index 9866144e361..2e6d3a94bd3 100644
--- a/test/tools/llvm-cov/showRegionMarkers.cpp
+++ b/test/tools/llvm-cov/showRegionMarkers.cpp
@@ -21,3 +21,6 @@ int main() {                      // CHECK: Marker at [[@LINE]]:12 = 1
 
   return 0;
 }
+
+// llvm-cov doesn't work on big endian yet
+// XFAIL: powerpc64-, s390x, mips-, mips64-, sparc