diff --git a/dlls/oleaut32/tests/vartype.c b/dlls/oleaut32/tests/vartype.c
index 3e5730b151c..c3ec180fac2 100644
--- a/dlls/oleaut32/tests/vartype.c
+++ b/dlls/oleaut32/tests/vartype.c
@@ -4413,9 +4413,104 @@ static void test_VarDecCmp(void)
   MATHVARS1;
 
   CHECKPTR(VarDecCmp);
+
   SETDEC(l,0,0,0,1); SETDEC(out,0,0,0,1); MATH1(VarDecCmp); EXPECT_EQ;
   SETDEC(l,0,0,0,1); SETDEC(out,0,0,0,0); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(l,0,0,0,1); SETDEC(out,0,0,-1,-1); MATH1(VarDecCmp); EXPECT_LT;
+
+  SETDEC(l,0,0,0,1); SETDEC(out,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(l,0,0,0,1); SETDEC(out,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(l,0,0,0,1); SETDEC(out,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); todo_wine EXPECT_GT;
+
+  SETDEC(l,0,DECIMAL_NEG,0,1); SETDEC(out,0,0,0,1); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(l,0,DECIMAL_NEG,0,1); SETDEC(out,0,0,0,0); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(l,0,DECIMAL_NEG,0,1); SETDEC(out,0,0,-1,-1); MATH1(VarDecCmp); todo_wine EXPECT_LT;
+
+  SETDEC(l,0,DECIMAL_NEG,0,1); SETDEC(out,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(l,0,DECIMAL_NEG,0,1); SETDEC(out,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(l,0,DECIMAL_NEG,0,1); SETDEC(out,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); EXPECT_GT;
+
   SETDEC(l,0,0,0,0); SETDEC(out,0,0,0,1); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(l,0,0,0,0); SETDEC(out,0,0,0,0); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(l,0,0,0,0); SETDEC(out,0,0,-1,-1); MATH1(VarDecCmp); EXPECT_LT;
+
+  SETDEC(l,0,0,0,0); SETDEC(out,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(l,0,0,0,0); SETDEC(out,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(l,0,0,0,0); SETDEC(out,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); EXPECT_GT;
+
+  SETDEC(l,0,DECIMAL_NEG,0,0); SETDEC(out,0,0,0,1); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(l,0,DECIMAL_NEG,0,0); SETDEC(out,0,0,0,0); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(l,0,DECIMAL_NEG,0,0); SETDEC(out,0,0,-1,-1); MATH1(VarDecCmp); EXPECT_LT;
+
+  SETDEC(l,0,DECIMAL_NEG,0,0); SETDEC(out,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(l,0,DECIMAL_NEG,0,0); SETDEC(out,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(l,0,DECIMAL_NEG,0,0); SETDEC(out,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); EXPECT_GT;
+
+  SETDEC(l,0,0,-1,-1); SETDEC(out,0,0,0,1); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(l,0,0,-1,-1); SETDEC(out,0,0,0,0); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(l,0,0,-1,-1); SETDEC(out,0,0,-1,-1); MATH1(VarDecCmp); EXPECT_EQ;
+
+  SETDEC(l,0,0,-1,-1); SETDEC(out,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); todo_wine EXPECT_GT;
+  SETDEC(l,0,0,-1,-1); SETDEC(out,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(l,0,0,-1,-1); SETDEC(out,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); todo_wine EXPECT_GT;
+
+  SETDEC(l,0,DECIMAL_NEG,-1,-1); SETDEC(out,0,0,0,1); MATH1(VarDecCmp); todo_wine EXPECT_LT;
+  SETDEC(l,0,DECIMAL_NEG,-1,-1); SETDEC(out,0,0,0,0); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(l,0,DECIMAL_NEG,-1,-1); SETDEC(out,0,0,-1,-1); MATH1(VarDecCmp); todo_wine EXPECT_LT;
+
+  SETDEC(l,0,DECIMAL_NEG,-1,-1); SETDEC(out,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(l,0,DECIMAL_NEG,-1,-1); SETDEC(out,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(l,0,DECIMAL_NEG,-1,-1); SETDEC(out,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); EXPECT_EQ;
+
+
+  SETDEC(out,0,0,0,1); SETDEC(l,0,0,0,1); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(out,0,0,0,1); SETDEC(l,0,0,0,0); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(out,0,0,0,1); SETDEC(l,0,0,-1,-1); MATH1(VarDecCmp); EXPECT_GT;
+
+  SETDEC(out,0,0,0,1); SETDEC(l,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(out,0,0,0,1); SETDEC(l,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(out,0,0,0,1); SETDEC(l,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); todo_wine EXPECT_LT;
+
+  SETDEC(out,0,DECIMAL_NEG,0,1); SETDEC(l,0,0,0,1); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(out,0,DECIMAL_NEG,0,1); SETDEC(l,0,0,0,0); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(out,0,DECIMAL_NEG,0,1); SETDEC(l,0,0,-1,-1); MATH1(VarDecCmp); todo_wine EXPECT_GT;
+
+  SETDEC(out,0,DECIMAL_NEG,0,1); SETDEC(l,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(out,0,DECIMAL_NEG,0,1); SETDEC(l,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(out,0,DECIMAL_NEG,0,1); SETDEC(l,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); EXPECT_LT;
+
+  SETDEC(out,0,0,0,0); SETDEC(l,0,0,0,1); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(out,0,0,0,0); SETDEC(l,0,0,0,0); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(out,0,0,0,0); SETDEC(l,0,0,-1,-1); MATH1(VarDecCmp); EXPECT_GT;
+
+  SETDEC(out,0,0,0,0); SETDEC(l,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(out,0,0,0,0); SETDEC(l,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(out,0,0,0,0); SETDEC(l,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); EXPECT_LT;
+
+  SETDEC(out,0,DECIMAL_NEG,0,0); SETDEC(l,0,0,0,1); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(out,0,DECIMAL_NEG,0,0); SETDEC(l,0,0,0,0); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(out,0,DECIMAL_NEG,0,0); SETDEC(l,0,0,-1,-1); MATH1(VarDecCmp); EXPECT_GT;
+
+  SETDEC(out,0,DECIMAL_NEG,0,0); SETDEC(l,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(out,0,DECIMAL_NEG,0,0); SETDEC(l,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_EQ;
+  SETDEC(out,0,DECIMAL_NEG,0,0); SETDEC(l,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); EXPECT_LT;
+
+  SETDEC(out,0,0,-1,-1); SETDEC(l,0,0,0,1); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(out,0,0,-1,-1); SETDEC(l,0,0,0,0); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(out,0,0,-1,-1); SETDEC(l,0,0,-1,-1); MATH1(VarDecCmp); EXPECT_EQ;
+
+  SETDEC(out,0,0,-1,-1); SETDEC(l,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); todo_wine EXPECT_LT;
+  SETDEC(out,0,0,-1,-1); SETDEC(l,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_LT;
+  SETDEC(out,0,0,-1,-1); SETDEC(l,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); todo_wine EXPECT_LT;
+
+  SETDEC(out,0,DECIMAL_NEG,-1,-1); SETDEC(l,0,0,0,1); MATH1(VarDecCmp); todo_wine EXPECT_GT;
+  SETDEC(out,0,DECIMAL_NEG,-1,-1); SETDEC(l,0,0,0,0); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(out,0,DECIMAL_NEG,-1,-1); SETDEC(l,0,0,-1,-1); MATH1(VarDecCmp); todo_wine EXPECT_GT;
+
+  SETDEC(out,0,DECIMAL_NEG,-1,-1); SETDEC(l,0,DECIMAL_NEG,0,1); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(out,0,DECIMAL_NEG,-1,-1); SETDEC(l,0,DECIMAL_NEG,0,0); MATH1(VarDecCmp); EXPECT_GT;
+  SETDEC(out,0,DECIMAL_NEG,-1,-1); SETDEC(l,0,DECIMAL_NEG,-1,-1); MATH1(VarDecCmp); EXPECT_EQ;
+
 }
 
 /*