bpo-43892: Make match patterns explicit in the AST (GH-25585)

Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>
diff --git a/Lib/test/test_patma.py b/Lib/test/test_patma.py
index 40580be..f327552 100644
--- a/Lib/test/test_patma.py
+++ b/Lib/test/test_patma.py
@@ -2857,6 +2857,22 @@ class Class:
         self.assertIs(y, None)
         self.assertIs(z, None)
 
+    @no_perf
+    def test_patma_283(self):
+        self.assert_syntax_error("""
+        match ...:
+            case {0+0: _}:
+                pass
+        """)
+
+    @no_perf
+    def test_patma_284(self):
+        self.assert_syntax_error("""
+        match ...:
+            case {f"": _}:
+                pass
+        """)
+
 
 class PerfPatma(TestPatma):