diff --git a/src/Tokenizer.ts b/src/Tokenizer.ts
index e6f900d457..2b15fe2dc6 100644
--- a/src/Tokenizer.ts
+++ b/src/Tokenizer.ts
@@ -200,11 +200,16 @@ export class _Tokenizer<ParserOutput = string, RendererOutput = string> {
         } else if (lastToken?.type === 'blockquote') {
           // include continuation in nested blockquote
           const oldToken = lastToken as Tokens.Blockquote;
-          const newText = oldToken.raw + '\n' + lines.join('\n');
+          // The continuation lines belong to the same nesting frame as the
+          // nested blockquote, which already had one '>' marker stripped, so
+          // strip one marker from them too. Otherwise a restated marker after a
+          // lazy line is re-parsed as a spurious deeper blockquote.
+          const continuation = lines.join('\n');
+          const newText = oldToken.raw + '\n' + continuation.replace(this.rules.other.blockquoteSetextReplace2, '');
           const newToken = this.blockquote(newText)!;
           tokens[tokens.length - 1] = newToken;
 
-          raw = raw.substring(0, raw.length - oldToken.raw.length) + newToken.raw;
+          raw = `${raw}\n${continuation}`;
           text = text.substring(0, text.length - oldToken.text.length) + newToken.text;
           break;
         } else if (lastToken?.type === 'list') {
diff --git a/test/specs/new/blockquote_nested_lazy_continuation.html b/test/specs/new/blockquote_nested_lazy_continuation.html
new file mode 100644
index 0000000000..ef017d70c7
--- /dev/null
+++ b/test/specs/new/blockquote_nested_lazy_continuation.html
@@ -0,0 +1,7 @@
+<blockquote>
+<blockquote>
+<p>a
+b
+c</p>
+</blockquote>
+</blockquote>
diff --git a/test/specs/new/blockquote_nested_lazy_continuation.md b/test/specs/new/blockquote_nested_lazy_continuation.md
new file mode 100644
index 0000000000..045c52ebe2
--- /dev/null
+++ b/test/specs/new/blockquote_nested_lazy_continuation.md
@@ -0,0 +1,3 @@
+> > a
+b
+> > c