diff --git a/dev/lib/directive-container.js b/dev/lib/directive-container.js
index 801757f..08fc838 100644
--- a/dev/lib/directive-container.js
+++ b/dev/lib/directive-container.js
@@ -23,6 +23,7 @@ export const directiveContainer = {
 
 const label = {tokenize: tokenizeLabel, partial: true}
 const attributes = {tokenize: tokenizeAttributes, partial: true}
+const nonLazyLine = {tokenize: tokenizeNonLazyLine, partial: true}
 
 /** @type {Tokenizer} */
 function tokenizeDirectiveContainer(effects, ok, nok) {
@@ -93,20 +94,26 @@ function tokenizeDirectiveContainer(effects, ok, nok) {
     effects.exit('directiveContainerFence')
 
     if (code === codes.eof) {
-      effects.exit('directiveContainer')
-      return ok(code)
+      return afterOpening(code)
     }
 
     if (markdownLineEnding(code)) {
-      effects.enter(types.lineEnding)
-      effects.consume(code)
-      effects.exit(types.lineEnding)
-      return self.interrupt ? ok : contentStart
+      if (self.interrupt) {
+        return ok(code)
+      }
+
+      return effects.attempt(nonLazyLine, contentStart, afterOpening)(code)
     }
 
     return nok(code)
   }
 
+  /** @type {State} */
+  function afterOpening(code) {
+    effects.exit('directiveContainer')
+    return ok(code)
+  }
+
   /** @type {State} */
   function contentStart(code) {
     if (code === codes.eof) {
@@ -157,16 +164,28 @@ function tokenizeDirectiveContainer(effects, ok, nok) {
     }
 
     if (markdownLineEnding(code)) {
-      effects.consume(code)
-      const t = effects.exit(types.chunkDocument)
-      self.parser.lazy[t.start.line] = false
-      return lineStart
+      return effects.check(nonLazyLine, nonLazyLineAfter, lineAfter)(code)
     }
 
     effects.consume(code)
     return contentContinue
   }
 
+  /** @type {State} */
+  function nonLazyLineAfter(code) {
+    effects.consume(code)
+    const t = effects.exit(types.chunkDocument)
+    self.parser.lazy[t.start.line] = false
+    return lineStart
+  }
+
+  /** @type {State} */
+  function lineAfter(code) {
+    const t = effects.exit(types.chunkDocument)
+    self.parser.lazy[t.start.line] = false
+    return after(code)
+  }
+
   /** @type {State} */
   function after(code) {
     effects.exit('directiveContainerContent')
@@ -252,3 +271,24 @@ function tokenizeAttributes(effects, ok, nok) {
     true
   )
 }
+
+/** @type {Tokenizer} */
+function tokenizeNonLazyLine(effects, ok, nok) {
+  const self = this
+
+  return start
+
+  /** @type {State} */
+  function start(code) {
+    assert(markdownLineEnding(code), 'expected eol')
+    effects.enter(types.lineEnding)
+    effects.consume(code)
+    effects.exit(types.lineEnding)
+    return lineStart
+  }
+
+  /** @type {State} */
+  function lineStart(code) {
+    return self.parser.lazy[self.now().line] ? nok(code) : ok(code)
+  }
+}
diff --git a/test/index.js b/test/index.js
index 605a066..9390cc3 100644
--- a/test/index.js
+++ b/test/index.js
@@ -710,6 +710,18 @@ test('micromark-extension-directive (syntax)', (t) => {
       'should support a thematic break before a leaf'
     )
 
+    t.equal(
+      micromark('> ::a\nb', options({'*': h})),
+      '<blockquote><a></a>\n</blockquote>\n<p>b</p>',
+      'should not support lazyness (1)'
+    )
+
+    t.equal(
+      micromark('> a\n::b', options({'*': h})),
+      '<blockquote>\n<p>a</p>\n</blockquote>\n<b></b>',
+      'should not support lazyness (2)'
+    )
+
     t.end()
   })
 
@@ -1032,7 +1044,7 @@ test('micromark-extension-directive (syntax)', (t) => {
 
     t.equal(
       micromark('>a\n:::a\nb', options()),
-      '<blockquote>\n<p>a</p>\n</blockquote>',
+      '<blockquote>\n<p>a</p>\n</blockquote>\n',
       'should support a block quote before a container'
     )
 
@@ -1074,7 +1086,7 @@ test('micromark-extension-directive (syntax)', (t) => {
 
     t.equal(
       micromark('* a\n:::a\nb', options()),
-      '<ul>\n<li>a</li>\n</ul>',
+      '<ul>\n<li>a</li>\n</ul>\n',
       'should support a list before a container'
     )
 
@@ -1114,6 +1126,30 @@ test('micromark-extension-directive (syntax)', (t) => {
       'should support prefixed containers (4)'
     )
 
+    t.equal(
+      micromark('> :::a\nb', options({'*': h})),
+      '<blockquote><a></a>\n</blockquote>\n<p>b</p>',
+      'should not support lazyness (1)'
+    )
+
+    t.equal(
+      micromark('> :::a\n> b\nc', options({'*': h})),
+      '<blockquote><a>\n<p>b</p>\n</a>\n</blockquote>\n<p>c</p>',
+      'should not support lazyness (2)'
+    )
+
+    t.equal(
+      micromark('> a\n:::b', options({'*': h})),
+      '<blockquote>\n<p>a</p>\n</blockquote>\n<b></b>',
+      'should not support lazyness (3)'
+    )
+
+    t.equal(
+      micromark('> :::a\n:::', options({'*': h})),
+      '<blockquote><a></a>\n</blockquote>\n<p>:::</p>',
+      'should not support lazyness (4)'
+    )
+
     t.end()
   })