diff --git a/src/services/data_dir.spec.ts b/src/services/data_dir.spec.ts
index 8192b8059..7ba31ea29 100644
--- a/src/services/data_dir.spec.ts
+++ b/src/services/data_dir.spec.ts
@@ -287,7 +287,7 @@ describe("data_dir.ts unit tests", async () => {
             const result = getDataDirs(`${mockValuePrefix}_TRILIUM_DATA_DIR`);
 
             for (const key in result) {
-                expect(result[key]).toEqual(`${mockValuePrefix}_${key}`);
+                expect(result[key as keyof typeof result]).toEqual(`${mockValuePrefix}_${key}`);
             }
         });
 
@@ -302,7 +302,7 @@ describe("data_dir.ts unit tests", async () => {
             const result = getDataDirs(mockDataDir);
 
             for (const key in result) {
-                expect(result[key].startsWith(mockDataDir)).toBeTruthy();
+                expect(result[key as keyof typeof result].startsWith(mockDataDir)).toBeTruthy();
             }
 
             mockFn.pathJoinMock.mockReset();
@@ -335,7 +335,7 @@ describe("data_dir.ts unit tests", async () => {
             if (typeof changeAttemptResult === "string") {
                 // if it didn't throw above: assert that it did not change the value of it or any other keys of the object
                 for (const key in result) {
-                    expect(result[key].startsWith(mockDataDirBase)).toBeTruthy();
+                    expect(result[key as keyof typeof result].startsWith(mockDataDirBase)).toBeTruthy();
                 }
             } else {
                 expect(changeAttemptResult).toBeInstanceOf(TypeError);