diff --git a/compiler/forget/src/Inference/InlineUseMemo.ts b/compiler/forget/src/Inference/InlineUseMemo.ts
index 5a55ac9f70..46f96e6ef2 100644
--- a/compiler/forget/src/Inference/InlineUseMemo.ts
+++ b/compiler/forget/src/Inference/InlineUseMemo.ts
@@ -100,15 +100,15 @@ export function inlineUseMemo(fn: HIRFunction): void {
             }
 
             if (body.loweredFunc.params.length > 0) {
-              CompilerError.invariant(
-                "Did not expect any arguments to useMemo callback",
+              CompilerError.invalidInput(
+                "useMemo callbacks may not accept any arguments",
                 body.loc
               );
             }
 
             if (body.loweredFunc.async || body.loweredFunc.generator) {
-              CompilerError.invariant(
-                "Did not expect useMemo callback to be async or a generator",
+              CompilerError.invalidInput(
+                "useMemo callbacks may not be async or generator functions",
                 body.loc
               );
             }
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.mutate-after-aliased-freeze.expect.md b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-mutate-after-aliased-freeze.expect.md
similarity index 100%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.mutate-after-aliased-freeze.expect.md
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-mutate-after-aliased-freeze.expect.md
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.mutate-after-aliased-freeze.js b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-mutate-after-aliased-freeze.js
similarity index 100%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.mutate-after-aliased-freeze.js
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-mutate-after-aliased-freeze.js
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.mutate-after-freeze.expect.md b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-mutate-after-freeze.expect.md
similarity index 100%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.mutate-after-freeze.expect.md
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-mutate-after-freeze.expect.md
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.mutate-after-freeze.js b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-mutate-after-freeze.js
similarity index 100%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.mutate-after-freeze.js
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-mutate-after-freeze.js
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.sketchy-code-use-forget.expect.md b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-sketchy-code-use-forget.expect.md
similarity index 100%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.sketchy-code-use-forget.expect.md
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-sketchy-code-use-forget.expect.md
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.sketchy-code-use-forget.js b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-sketchy-code-use-forget.js
similarity index 100%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.sketchy-code-use-forget.js
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-sketchy-code-use-forget.js
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-async-callback.expect.md b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-async-callback.expect.md
similarity index 63%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-async-callback.expect.md
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-async-callback.expect.md
index 7184c16a40..c178b99ce7 100644
--- a/compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-async-callback.expect.md
+++ b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-async-callback.expect.md
@@ -15,7 +15,7 @@ function component(a, b) {
 ## Error
 
 ```
-[ReactForget] Invariant: Did not expect useMemo callback to be async or a generator (2:4)
+[ReactForget] InvalidInput: useMemo callbacks may not be async or generator functions (2:4)
 ```
           
       
\ No newline at end of file
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-async-callback.js b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-async-callback.js
similarity index 100%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-async-callback.js
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-async-callback.js
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-callback-args.expect.md b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-callback-args.expect.md
similarity index 63%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-callback-args.expect.md
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-callback-args.expect.md
index 63ff18a41a..1c645155d3 100644
--- a/compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-callback-args.expect.md
+++ b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-callback-args.expect.md
@@ -13,7 +13,7 @@ function component(a, b) {
 ## Error
 
 ```
-[ReactForget] Invariant: Did not expect any arguments to useMemo callback (2:2)
+[ReactForget] InvalidInput: useMemo callbacks may not accept any arguments (2:2)
 ```
           
       
\ No newline at end of file
diff --git a/compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-callback-args.js b/compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-callback-args.js
similarity index 100%
rename from compiler/forget/src/__tests__/fixtures/compiler/error.useMemo-callback-args.js
rename to compiler/forget/src/__tests__/fixtures/compiler/error.invalid-useMemo-callback-args.js