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diff --git a/tests/spec/glsl-es-1.00/compiler/structure-and-array-operations/array-equal-mismatched-size.vert b/tests/spec/glsl-es-1.00/compiler/structure-and-array-operations/array-equal-mismatched-size.vert
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+++ b/tests/spec/glsl-es-1.00/compiler/structure-and-array-operations/array-equal-mismatched-size.vert
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+/* [config]
+ * expect_result: fail
+ * glsl_version: 1.20
+ * glsles_version: 1.00
+ * [end config]
+ *
+ * From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
+ *
+ *     "The equality operators and assignment operator are only allowed if the
+ *     two operands are same size and type....Both array operands must be
+ *     explicitly sized. When using the equality operators ... two arrays are
+ *     equal if and only if all the elements are element-wise equal.
+ */
+
+
+uniform vec4 a[2];
+uniform vec4 b[3]; // Note the differing size
+
+void main()
+{
+  gl_Position = vec4(a == b);
+}