diff --git a/docs/changelog.md b/docs/changelog.md
index f46483d4..0e87a3ed 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -12,6 +12,8 @@ Requires libvips v8.13.0
 
 * Add WebP `minSize` and `mixed` options for greater control over animation frames.
 
+* Remove previously-deprecated WebP `reductionEffort` and HEIF `speed` options. Use `effort` to control these.
+
 * Use combined bounding box of alpha and non-alpha channels for `trim` operation.
   [#2166](https://github.com/lovell/sharp/issues/2166)
 
diff --git a/lib/output.js b/lib/output.js
index df09965d..3ba4a99e 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -500,12 +500,11 @@ function webp (options) {
     if (is.defined(options.smartSubsample)) {
       this._setBooleanOption('webpSmartSubsample', options.smartSubsample);
     }
-    const effort = is.defined(options.effort) ? options.effort : options.reductionEffort;
-    if (is.defined(effort)) {
-      if (is.integer(effort) && is.inRange(effort, 0, 6)) {
-        this.options.webpEffort = effort;
+    if (is.defined(options.effort)) {
+      if (is.integer(options.effort) && is.inRange(options.effort, 0, 6)) {
+        this.options.webpEffort = options.effort;
       } else {
-        throw is.invalidParameterError('effort', 'integer between 0 and 6', effort);
+        throw is.invalidParameterError('effort', 'integer between 0 and 6', options.effort);
       }
     }
     if (is.defined(options.minSize)) {
@@ -884,12 +883,6 @@ function heif (options) {
       } else {
         throw is.invalidParameterError('effort', 'integer between 0 and 9', options.effort);
       }
-    } else if (is.defined(options.speed)) {
-      if (is.integer(options.speed) && is.inRange(options.speed, 0, 9)) {
-        this.options.heifEffort = 9 - options.speed;
-      } else {
-        throw is.invalidParameterError('speed', 'integer between 0 and 9', options.speed);
-      }
     }
     if (is.defined(options.chromaSubsampling)) {
       if (is.string(options.chromaSubsampling) && is.inArray(options.chromaSubsampling, ['4:2:0', '4:4:4'])) {
diff --git a/test/unit/heif.js b/test/unit/heif.js
index 36a73e3a..b8568247 100644
--- a/test/unit/heif.js
+++ b/test/unit/heif.js
@@ -52,7 +52,7 @@ describe('HEIF', () => {
   });
   it('valid effort does not throw an error', () => {
     assert.doesNotThrow(() => {
-      sharp().heif({ speed: 6 });
+      sharp().heif({ effort: 6 });
     });
   });
   it('out of range effort should throw an error', () => {
@@ -65,21 +65,6 @@ describe('HEIF', () => {
       sharp().heif({ effort: 'fail' });
     });
   });
-  it('valid speed does not throw an error', () => {
-    assert.doesNotThrow(() => {
-      sharp().heif({ speed: 6 });
-    });
-  });
-  it('out of range speed should throw an error', () => {
-    assert.throws(() => {
-      sharp().heif({ speed: 10 });
-    });
-  });
-  it('invalid speed should throw an error', () => {
-    assert.throws(() => {
-      sharp().heif({ speed: 'fail' });
-    });
-  });
   it('invalid chromaSubsampling should throw an error', () => {
     assert.throws(() => {
       sharp().heif({ chromaSubsampling: 'fail' });
diff --git a/test/unit/webp.js b/test/unit/webp.js
index a297bcc0..ab7fc4c4 100644
--- a/test/unit/webp.js
+++ b/test/unit/webp.js
@@ -121,12 +121,6 @@ describe('WebP', function () {
     });
   });
 
-  it('invalid reductionEffort (deprecated) throws', () => {
-    assert.throws(() => {
-      sharp().webp({ reductionEffort: true });
-    });
-  });
-
   it('out of range effort throws', () => {
     assert.throws(() => {
       sharp().webp({ effort: -1 });