diff --git a/src/fast_check/transform.rs b/src/fast_check/transform.rs
index 7abcbef0b..0390b97d6 100644
--- a/src/fast_check/transform.rs
+++ b/src/fast_check/transform.rs
@@ -4,6 +4,7 @@
 #![allow(clippy::disallowed_methods)]
 #![allow(clippy::disallowed_types)]
 
+use std::collections::HashSet;
 use std::sync::Arc;
 
 use deno_ast::swc::ast::*;
@@ -474,6 +475,8 @@ impl<'a> FastCheckTransformer<'a> {
       }
     }
     let mut insert_members = Vec::new();
+    let mut had_private_constructor = false;
+    let mut seen_ts_private_methods = HashSet::new();
     for mut member in std::mem::take(&mut n.body) {
       had_private = had_private
         || matches!(
@@ -481,8 +484,48 @@ impl<'a> FastCheckTransformer<'a> {
           ClassMember::PrivateMethod(_) | ClassMember::PrivateProp(_)
         );
 
-      let retain =
-        self.transform_class_member(&mut member, &mut insert_members)?;
+      let mut retain = true;
+      // do some extra checks to see whether it should be removed
+      if let ClassMember::Constructor(ctor) = &member {
+        if ctor.accessibility == Some(Accessibility::Private) {
+          if had_private_constructor {
+            retain = false;
+          } else {
+            had_private_constructor = true;
+          }
+        }
+      } else if let ClassMember::Method(method) = &member {
+        if method.accessibility == Some(Accessibility::Private) {
+          let key = match &method.key {
+            PropName::Ident(i) => Some(i.sym.to_string()),
+            PropName::Str(s) => Some(s.value.to_string()),
+            PropName::Num(n) => Some(
+              n.raw
+                .as_ref()
+                .map(|r| r.to_string())
+                .unwrap_or_else(|| n.value.to_string()),
+            ),
+
+            PropName::Computed(_) => None,
+            PropName::BigInt(n) => Some(
+              n.raw
+                .as_ref()
+                .map(|r| r.to_string())
+                .unwrap_or_else(|| n.value.to_string()),
+            ),
+          };
+          retain = match key {
+            Some(key) => seen_ts_private_methods.insert(key),
+            None => false,
+          };
+        }
+      }
+
+      if retain {
+        retain =
+          self.transform_class_member(&mut member, &mut insert_members)?;
+      }
+
       if retain {
         members.push(member);
       } else {
@@ -638,9 +681,6 @@ impl<'a> FastCheckTransformer<'a> {
         }
 
         if n.accessibility == Some(Accessibility::Private) {
-          if n.body.is_none() {
-            return Ok(false);
-          }
           n.params.clear();
           return Ok(true);
         }
diff --git a/tests/specs/graph/jsr/FastCheck_ClassCtors.txt b/tests/specs/graph/jsr/FastCheck_ClassCtors.txt
index 616f0a345..c18dff3f9 100644
--- a/tests/specs/graph/jsr/FastCheck_ClassCtors.txt
+++ b/tests/specs/graph/jsr/FastCheck_ClassCtors.txt
@@ -20,6 +20,9 @@ export class ClassPrivateCtorWithOverloads {
   private constructor(prop: string, other: Private1) {
   }
 }
+export declare class ClassDeclarePrivateCtor {
+  private constructor(prop: string, other: Private1);
+}
 export class ClassProtectedCtor {
   protected constructor(prop: string, other = 5) {
   }
@@ -97,7 +100,7 @@ import 'jsr:@scope/a'
     },
     {
       "kind": "esm",
-      "size": 1279,
+      "size": 1382,
       "mediaType": "TypeScript",
       "specifier": "https://jsr.io/@scope/a/1.0.0/mod.ts"
     }
@@ -119,7 +122,10 @@ Fast check https://jsr.io/@scope/a/1.0.0/mod.ts:
     private constructor(){}
   }
   export class ClassPrivateCtorWithOverloads {
-    private constructor(){}
+    private constructor();
+  }
+  export declare class ClassDeclarePrivateCtor {
+    private constructor();
   }
   export class ClassProtectedCtor {
     protected constructor(prop: string, other?: number){}
@@ -171,6 +177,9 @@ Fast check https://jsr.io/@scope/a/1.0.0/mod.ts:
   export declare class ClassPrivateCtorWithOverloads {
     private constructor();
   }
+  export declare class ClassDeclarePrivateCtor {
+    private constructor();
+  }
   export declare class ClassProtectedCtor {
     protected constructor(prop: string, other?: number);
   }
diff --git a/tests/specs/graph/jsr/FastCheck_ClassMethods.txt b/tests/specs/graph/jsr/FastCheck_ClassMethods.txt
new file mode 100644
index 000000000..ea85ca0b3
--- /dev/null
+++ b/tests/specs/graph/jsr/FastCheck_ClassMethods.txt
@@ -0,0 +1,152 @@
+# https://jsr.io/@scope/a/meta.json
+{"versions": { "1.0.0": {} } }
+
+# https://jsr.io/@scope/a/1.0.0_meta.json
+{ "exports": { ".": "./mod.ts" } }
+
+# https://jsr.io/@scope/a/1.0.0/mod.ts
+const getEntity = Symbol();
+
+export class PrivateMethodOverloadable {
+  private constructor();
+  private constructor() {
+  }
+
+  private [getEntity](): Promise<string>;
+  private async [getEntity]() {
+  }
+
+  private method(): string {
+
+  }
+
+  private methodWithOverload(): string;
+  private methodWithOverload(): string {
+
+  }
+
+  private [123](): string;
+  private [123](): string {
+
+  }
+
+  private [9876n](): string;
+  private [9876n](): string {
+
+  }
+
+  private "stringAndIdent"(): string;
+  private stringAndIdent(): string {
+  }
+
+  private "stringOnly"(): string;
+  private "stringOnly"(): string {
+  }
+}
+
+class Private {}
+
+export class AmbientPrivateMethodOverloadable {
+  private constructor(value: string);
+  private constructor(private: Private);
+
+  private [getEntity](value: string): Promise<string>;
+  private async [getEntity]();
+
+  private method(value: string): string;
+
+  private methodWithOverload(value: string): string;
+  private methodWithOverload(): string;
+
+  private [123](value: string): string;
+  private [123](): string;
+
+  private [9876n](value: string): string;
+  private [9876n](): string;
+
+  private "stringAndIdent"(value: string): string;
+  private stringAndIdent(): string;
+
+  private "stringOnly"(value: string): string;
+  private "stringOnly"(): string;
+}
+
+# mod.ts
+import 'jsr:@scope/a'
+
+# output
+{
+  "roots": [
+    "file:///mod.ts"
+  ],
+  "modules": [
+    {
+      "kind": "esm",
+      "dependencies": [
+        {
+          "specifier": "jsr:@scope/a",
+          "code": {
+            "specifier": "jsr:@scope/a",
+            "span": {
+              "start": {
+                "line": 0,
+                "character": 7
+              },
+              "end": {
+                "line": 0,
+                "character": 21
+              }
+            }
+          }
+        }
+      ],
+      "size": 22,
+      "mediaType": "TypeScript",
+      "specifier": "file:///mod.ts"
+    },
+    {
+      "kind": "esm",
+      "size": 1289,
+      "mediaType": "TypeScript",
+      "specifier": "https://jsr.io/@scope/a/1.0.0/mod.ts"
+    }
+  ],
+  "redirects": {
+    "jsr:@scope/a": "https://jsr.io/@scope/a/1.0.0/mod.ts"
+  },
+  "packages": {
+    "@scope/a": "@scope/a@1.0.0"
+  }
+}
+
+Fast check https://jsr.io/@scope/a/1.0.0/mod.ts:
+  {}
+  export class PrivateMethodOverloadable {
+    private constructor();
+    private method!: unknown;
+    private methodWithOverload!: unknown;
+    private "stringAndIdent"!: unknown;
+    private "stringOnly"!: unknown;
+  }
+  export class AmbientPrivateMethodOverloadable {
+    private constructor();
+    private method!: unknown;
+    private methodWithOverload!: unknown;
+    private "stringAndIdent"!: unknown;
+    private "stringOnly"!: unknown;
+  }
+  --- DTS ---
+  export declare class PrivateMethodOverloadable {
+    private constructor();
+    private method: unknown;
+    private methodWithOverload: unknown;
+    private "stringAndIdent": unknown;
+    private "stringOnly": unknown;
+  }
+  export declare class AmbientPrivateMethodOverloadable {
+    private constructor();
+    private method: unknown;
+    private methodWithOverload: unknown;
+    private "stringAndIdent": unknown;
+    private "stringOnly": unknown;
+  }