diff --git a/__tests__/algorithm.test.ts b/__tests__/algorithm.test.ts
index b762bbb..aeec34c 100644
--- a/__tests__/algorithm.test.ts
+++ b/__tests__/algorithm.test.ts
@@ -327,7 +327,7 @@ describe('FSRS apply_fuzz', () => {
 })
 
 describe('change Params', () => {
-  test('change FSRSParameters', () => {
+  test('change FSRSParameters[FSRS]', () => {
     const f = fsrs()
     // I(r,s),r=0.9 then I(r,s)=s
     expect(f.interval_modifier).toEqual(1)
@@ -366,6 +366,54 @@ describe('change Params', () => {
 
     f.parameters = {} // check default values
     expect(f.parameters).toEqual(generatorParameters())
+
+    f.parameters.enable_short_term = false
+    expect(f.parameters.enable_short_term).toEqual(false)
+  })
+
+  test('change FSRSParameters[FSRSAlgorithm]', () => {
+    const params = generatorParameters()
+    const f = new FSRSAlgorithm(params)
+    // I(r,s),r=0.9 then I(r,s)=s
+    expect(f.interval_modifier).toEqual(1)
+    expect(f.parameters).toEqual(generatorParameters())
+
+    const request_retention = 0.8
+    const update_w = [
+      1.14, 1.01, 5.44, 14.67, 5.3024, 1.5662, 1.2503, 0.0028, 1.5489, 0.1763,
+      0.9953, 2.7473, 0.0179, 0.3105, 0.3976, 0.0, 2.0902, 0.48, 0.64,
+    ]
+    f.parameters = generatorParameters({
+      request_retention: request_retention,
+      w: update_w,
+      enable_fuzz: true,
+    })
+    expect(f.parameters.request_retention).toEqual(request_retention)
+    expect(f.parameters.w).toEqual(update_w)
+    expect(f.parameters.enable_fuzz).toEqual(true)
+    expect(f.interval_modifier).toEqual(
+      f.calculate_interval_modifier(request_retention)
+    )
+
+    f.parameters.request_retention = default_request_retention
+    expect(f.interval_modifier).toEqual(
+      f.calculate_interval_modifier(default_request_retention)
+    )
+
+    f.parameters.w = default_w
+    expect(f.parameters.w).toEqual(default_w)
+
+    f.parameters.maximum_interval = 365
+    expect(f.parameters.maximum_interval).toEqual(365)
+
+    f.parameters.enable_fuzz = default_enable_fuzz
+    expect(f.parameters.enable_fuzz).toEqual(default_enable_fuzz)
+
+    f.parameters = {} // check default values
+    expect(f.parameters).toEqual(generatorParameters())
+
+    f.parameters.enable_short_term = false
+    expect(f.parameters.enable_short_term).toEqual(false)
   })
 
   test('calculate_interval_modifier', () => {