diff --git a/test/assets/env.json b/test/assets/env.json
new file mode 100644
index 0000000..3b718b4
--- /dev/null
+++ b/test/assets/env.json
@@ -0,0 +1,4 @@
+{
+  "key1": "fromJson",
+  "key2" :"fromJson"
+}
\ No newline at end of file
diff --git a/test/assets/env.yml b/test/assets/env.yml
deleted file mode 100644
index a40e730..0000000
--- a/test/assets/env.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-key1: fromYml
-key2: fromYml
\ No newline at end of file
diff --git a/test/test.ts b/test/test.ts
index 99fd7f4..0213b6a 100644
--- a/test/test.ts
+++ b/test/test.ts
@@ -17,13 +17,13 @@ tap.test('key1 should be not be overwritten since it is already present', async
 });
 
 tap.test('key2 should be read from Yml', async () => {
-  expect(testQenv.getEnvVarRequired('key2')).to.equal('fromYml');
-  expect(testQenv.getEnvVarOnDemand('key2')).to.equal('fromYml');
+  expect(testQenv.getEnvVarRequired('key2')).to.equal('fromJson');
+  expect(testQenv.getEnvVarOnDemand('key2')).to.equal('fromJson');
 });
 
 tap.test('keyValueObjectArray should hold all retrieved values', async () => {
   expect(testQenv.keyValueObject.key1).to.equal('original');
-  expect(testQenv.keyValueObject.key2).to.equal('fromYml');
+  expect(testQenv.keyValueObject.key2).to.equal('fromJson');
 });
 
 tap.start();
diff --git a/ts/qenv.classes.qenv.ts b/ts/qenv.classes.qenv.ts
index 5cd2cdf..ce9f94e 100644
--- a/ts/qenv.classes.qenv.ts
+++ b/ts/qenv.classes.qenv.ts
@@ -31,7 +31,7 @@ export class Qenv {
     );
     this.envFilePathAbsolute = plugins.path.join(
       plugins.path.resolve(envFileBasePathArg),
-      'env.yml'
+      'env.json'
     );
 
     this.getRequiredEnvVars();
@@ -131,7 +131,7 @@ export class Qenv {
       this.logger.log('ok', `found ${requiredEnvVar} as environment variable`);
       chosenVar = envVar;
     } else if (envFileVar) {
-      this.logger.log('ok', `found ${requiredEnvVar} as env.yml variable`);
+      this.logger.log('ok', `found ${requiredEnvVar} as env.json variable`);
       chosenVar = envFileVar;
     } else if (dockerSecret) {
       this.logger.log('ok', `found ${requiredEnvVar} as docker secret`);