diff --git a/packages/rule-tester/src/types/DependencyConstraint.ts b/packages/rule-tester/src/types/DependencyConstraint.ts
index a59a0a737061..f2b38dbf2245 100644
--- a/packages/rule-tester/src/types/DependencyConstraint.ts
+++ b/packages/rule-tester/src/types/DependencyConstraint.ts
@@ -1,4 +1,9 @@
-import type { RangeOptions } from 'semver';
+// `Options` and `RangeOptions` are defined in the 'semver' package.
+// We redeclare them here to avoid a peer dependency on that package:
+export interface RangeOptions {
+  includePrerelease?: boolean | undefined;
+  loose?: boolean | undefined;
+}
 
 export interface SemverVersionConstraint {
   readonly range: string;