diff --git a/llvm/test/MC/AsmParser/ifeqs-diagnostics.s b/llvm/test/MC/AsmParser/ifeqs-diagnostics.s
new file mode 100644
index 000000000000..1e5e8c3751f6
--- /dev/null
+++ b/llvm/test/MC/AsmParser/ifeqs-diagnostics.s
@@ -0,0 +1,22 @@
+// RUN: not llvm-mc -triple i386 %s -o /dev/null 2>&1 | FileCheck %s
+
+.ifeqs
+
+// CHECK: error: expected string parameter for '.ifeqs' directive
+// CHECK: .ifeqs
+// CHECK:       ^
+
+.ifeqs "string1"
+
+// CHECK: error: expected comma after first string for '.ifeqs' directive
+// CHECK: .ifeqs "string1"
+// CHECK:                 ^
+
+.ifeqs "string1",
+
+// CHECK: error: expected string parameter for '.ifeqs' directive
+// CHECK: .ifeqs "string1",
+// CHECK:                  ^
+
+// CHECK-NOT: error: unmatched .ifs or .elses
+