diff --git a/lib/compress.js b/lib/compress.js
index bb25095a..e80d7a99 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3206,6 +3206,10 @@ merge(Compressor.prototype, {
                 if (!(node_def.id in in_use_ids)) {
                     in_use_ids[node_def.id] = true;
                     in_use.push(node_def);
+                    if (node_def = node_def.redefined()) {
+                        in_use_ids[node_def.id] = true;
+                        in_use.push(node_def);
+                    }
                 }
                 return true;
             }
diff --git a/test/compress/drop-unused.js b/test/compress/drop-unused.js
index 66b9d5ff..e114f050 100644
--- a/test/compress/drop-unused.js
+++ b/test/compress/drop-unused.js
@@ -1237,6 +1237,7 @@ var_catch_toplevel: {
     options = {
         conditionals: true,
         negate_iife: true,
+        passes: 2,
         reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
diff --git a/test/compress/functions.js b/test/compress/functions.js
index 18a23378..f7a1cf94 100644
--- a/test/compress/functions.js
+++ b/test/compress/functions.js
@@ -1516,7 +1516,8 @@ issue_2647_2: {
     }
     expect: {
         (function() {
-            console.log("pass".toUpperCase());
+            console.log((() => (x = "pass", x.toUpperCase()))());
+            var x;
         })();
     }
     expect_stdout: "PASS"
diff --git a/test/compress/reduce_vars.js b/test/compress/reduce_vars.js
index 7a5e66b5..a1964e57 100644
--- a/test/compress/reduce_vars.js
+++ b/test/compress/reduce_vars.js
@@ -5632,6 +5632,8 @@ defun_catch_1: {
         }
     }
     expect: {
+        // TODO: drop unused AST_Defun
+        function a() {}
         try {
             throw 42;
         } catch (a) {
@@ -5657,6 +5659,8 @@ defun_catch_2: {
     }
     expect: {
         try {
+            // TODO: drop unused AST_Defun
+            function a() {}
             throw 42;
         } catch (a) {
             console.log(a);
@@ -5682,6 +5686,8 @@ defun_catch_3: {
     expect: {
         try {
             throw 42;
+            // TODO: drop unused AST_Defun
+            function a() {}
         } catch (a) {
             console.log(a);
         }
@@ -5759,6 +5765,8 @@ defun_catch_6: {
         } catch (a) {
             console.log(a);
         }
+        // TODO: drop unused AST_Defun
+        function a() {}
     }
     expect_stdout: "42"
 }
diff --git a/test/run-tests.js b/test/run-tests.js
index 5dcacd87..1a0b8d46 100755
--- a/test/run-tests.js
+++ b/test/run-tests.js
@@ -208,9 +208,6 @@ function run_compress_tests() {
                     });
                     return false;
                 }
-                if (!reminify(test.options, input_code, input_formatted, test.expect_stdout)) {
-                    return false;
-                }
             }
             return true;
         }