diff --git a/e2e/fabloCommands.test.ts b/e2e/fabloCommands.test.ts
index b010927c..0467df2e 100644
--- a/e2e/fabloCommands.test.ts
+++ b/e2e/fabloCommands.test.ts
@@ -1,5 +1,7 @@
 import TestCommands from "./TestCommands";
 import { version as currentFabloVersion } from "../package.json";
+import { FabloConfigJson } from "../generators/types/FabloConfigJson";
+import * as fs from "fs";
 
 const commands = new TestCommands("e2e/__tmp__/commands-tests");
 
@@ -104,6 +106,36 @@ describe("validate", () => {
     expect(commandResult.output).toContain("commands-tests/fablo-config.json does not exist\n");
     expect(commands.getFiles()).toEqual([]);
   });
+
+  it("should print validation errors", () => {
+    // Given
+    const sourceConfigPath = require.resolve("../samples/fablo-config-hlf2-1org-1chaincode-raft-explorer.json");
+    const samplesDir = sourceConfigPath.replace("/fablo-config-hlf2-1org-1chaincode-raft-explorer.json", "");
+    const sourceConfig = require(sourceConfigPath) as FabloConfigJson;
+
+    // old schema
+    sourceConfig.$schema = "https://github.com/hyperledger-labs/fablo/releases/download/1.2.0/schema.json"
+
+    // invalid org
+    sourceConfig.orgs[0].organization.mspName = "some-org1";
+    sourceConfig.orgs[0].organization.name = "some-org1";
+
+    // save updated config
+    fs.writeFileSync(`${samplesDir}/invalid-fablo-config.json`, JSON.stringify(sourceConfig, null, 2));
+    const fabloConfig = `${commands.relativeRoot}/samples/invalid-fablo-config.json`;
+
+    // When
+    const commandResult = commands.fabloExec(`validate ${fabloConfig}`);
+
+    // Then
+    expect(commandResult).toEqual(TestCommands.success());
+    expect(commandResult.output).toContain("Critical error occured");
+    expect(commandResult.output).toContain("Json schema validation failed!");
+    expect(commandResult.output).toContain("instance.$schema : does not exactly match expected constant");
+    expect(commandResult.output).toContain(" instance.orgs[0].organization.name : does not match pattern");
+    expect(commandResult.output).toContain(" instance.orgs[0].organization.mspName : does not match pattern");
+    expect(commands.getFiles()).toEqual([]);
+  });
 });
 
 describe("extend config", () => {
diff --git a/src/app/index.ts b/src/app/index.ts
index 7548441d..e94ef2b0 100644
--- a/src/app/index.ts
+++ b/src/app/index.ts
@@ -3,8 +3,8 @@ import * as Generator from "yeoman-generator";
 export default class extends Generator {
   displayInfo(): void {
     const url = "https://github.com/hyperledger-labs/fablo";
-    this.log("This is main entry point for Yeoman app used in Fablo.");
-    this.log("Visit the project page to get more information.");
-    this.log(`---\n${url}\n---`);
+    console.log("This is main entry point for Yeoman app used in Fablo.");
+    console.log("Visit the project page to get more information.");
+    console.log(`---\n${url}\n---`);
   }
 }
diff --git a/src/extend-config/index.ts b/src/extend-config/index.ts
index ee099894..6c9b9275 100644
--- a/src/extend-config/index.ts
+++ b/src/extend-config/index.ts
@@ -22,7 +22,7 @@ class ExtendConfigGenerator extends Generator {
     const fabloConfigPath = `${this.env.cwd}/${this.options.fabloConfig}`;
     const json = parseFabloConfig(this.fs.read(fabloConfigPath));
     const configExtended = extendConfig(json);
-    this.log(JSON.stringify(configExtended, undefined, 2));
+    console.log(JSON.stringify(configExtended, undefined, 2));
   }
 }
 
diff --git a/src/init/index.ts b/src/init/index.ts
index cb550fe6..00073054 100644
--- a/src/init/index.ts
+++ b/src/init/index.ts
@@ -13,7 +13,7 @@ export default class InitGenerator extends Generator {
 
     const shouldInitWithNodeChaincode = this.args.length && this.args.find((v) => v === "node");
     if (shouldInitWithNodeChaincode) {
-      this.log("Creating sample Node.js chaincode");
+      console.log("Creating sample Node.js chaincode");
       this.fs.copy(this.templatePath("chaincodes"), this.destinationPath("chaincodes"));
       // force build on Node 12, since dev deps (@theledger/fabric-mock-stub) may not work on 16
       this.fs.write(this.destinationPath("chaincodes/chaincode-kv-node/.nvmrc"), "12");
@@ -42,10 +42,10 @@ export default class InitGenerator extends Generator {
     this.fs.write(this.destinationPath("fablo-config.json"), JSON.stringify(fabloConfigJson, undefined, 2));
 
     this.on("end", () => {
-      this.log("===========================================================");
-      this.log(chalk.bold("Sample config file created! :)"));
-      this.log("You can start your network with 'fablo up' command");
-      this.log("===========================================================");
+      console.log("===========================================================");
+      console.log(chalk.bold("Sample config file created! :)"));
+      console.log("You can start your network with 'fablo up' command");
+      console.log("===========================================================");
     });
   }
 }
diff --git a/src/list-compatible-updates/index.ts b/src/list-compatible-updates/index.ts
index 2c97cfd5..09266028 100644
--- a/src/list-compatible-updates/index.ts
+++ b/src/list-compatible-updates/index.ts
@@ -14,13 +14,13 @@ export default class ListCompatibleUpdatesGenerator extends Generator {
 
   _printVersions(versionsToPrint: string[]): void {
     if (versionsToPrint.length > 0) {
-      this.log(chalk.bold("====== !Compatible Fablo versions found! :) ============="));
-      this.log(`${chalk.underline.bold("Compatible")} versions:`);
-      versionsToPrint.forEach((version) => this.log(`- ${version}`));
-      this.log("");
-      this.log("To update just run command:");
-      this.log(`\t${chalk.bold("fablo use [version]")}`);
-      this.log(chalk.bold("==========================================================="));
+      console.log(chalk.bold("====== !Compatible Fablo versions found! :) ============="));
+      console.log(`${chalk.underline.bold("Compatible")} versions:`);
+      versionsToPrint.forEach((version) => console.log(`- ${version}`));
+      console.log("");
+      console.log("To update just run command:");
+      console.log(`\t${chalk.bold("fablo use [version]")}`);
+      console.log(chalk.bold("==========================================================="));
     }
   }
 }
diff --git a/src/list-versions/index.ts b/src/list-versions/index.ts
index 143d399c..a16e7c21 100644
--- a/src/list-versions/index.ts
+++ b/src/list-versions/index.ts
@@ -9,6 +9,6 @@ export default class ListVersionsGenerator extends Generator {
       .map((v) => (v === config.fabloVersion ? `${v} <== current` : v))
       .map((v) => (config.isFabloVersionSupported(v) && !v.includes("current") ? `${v} (compatible)` : v));
 
-    versionsSortedAndMarked.forEach((version) => this.log(`- ${version}`));
+    versionsSortedAndMarked.forEach((version) => console.log(`- ${version}`));
   }
 }
diff --git a/src/setup-docker/index.ts b/src/setup-docker/index.ts
index 092dfe78..560eb1e8 100644
--- a/src/setup-docker/index.ts
+++ b/src/setup-docker/index.ts
@@ -48,9 +48,9 @@ export default class SetupDockerGenerator extends Generator {
       .replace(/[^0-9]+/g, "");
     const composeNetworkName = `fablo_network_${dateString}`;
 
-    this.log(`Used network config: ${fabloConfigPath}`);
-    this.log(`Fabric version is: ${global.fabricVersion}`);
-    this.log(`Generating docker-compose network '${composeNetworkName}'...`);
+    console.log(`Used network config: ${fabloConfigPath}`);
+    console.log(`Fabric version is: ${global.fabricVersion}`);
+    console.log(`Generating docker-compose network '${composeNetworkName}'...`);
 
     // ======= fabric-config ============================================================
     this._copyOrgCryptoConfig(orgs);
@@ -73,9 +73,9 @@ export default class SetupDockerGenerator extends Generator {
     this._copyHooks(config.hooks);
 
     this.on("end", () => {
-      this.log("Done & done !!! Try the network out: ");
-      this.log("-> fablo up - to start network");
-      this.log("-> fablo help - to view all commands");
+      console.log("Done & done !!! Try the network out: ");
+      console.log("-> fablo up - to start network");
+      console.log("-> fablo help - to view all commands");
     });
   }
 
diff --git a/src/setup-k8s/index.ts b/src/setup-k8s/index.ts
index 36a99e88..4c5a9cc8 100644
--- a/src/setup-k8s/index.ts
+++ b/src/setup-k8s/index.ts
@@ -32,8 +32,8 @@ export default class SetupDockerGenerator extends Generator {
       .replace(/[^0-9]+/g, "");
     const composeNetworkName = `fablo_network_${dateString}`;
 
-    this.log(`Used network config: ${fabloConfigPath}`);
-    this.log(`Fabric version is: ${global.fabricVersion}`);
+    console.log(`Used network config: ${fabloConfigPath}`);
+    console.log(`Fabric version is: ${global.fabricVersion}`);
 
     this._copyGitIgnore();
 
@@ -49,9 +49,9 @@ export default class SetupDockerGenerator extends Generator {
     this._copyHooks(config.hooks);
 
     this.on("end", () => {
-      this.log("Done & done !!! Try the network out: ");
-      this.log("-> fablo up - to start network");
-      this.log("-> fablo help - to view all commands");
+      console.log("Done & done !!! Try the network out: ");
+      console.log("-> fablo up - to start network");
+      console.log("-> fablo help - to view all commands");
     });
   }
 
diff --git a/src/validate/index.ts b/src/validate/index.ts
index d25fcf55..98c80bca 100644
--- a/src/validate/index.ts
+++ b/src/validate/index.ts
@@ -74,8 +74,8 @@ class ValidateGenerator extends Generator {
     });
 
     this.addListener(validationErrorType.CRITICAL, (event) => {
-      this.log(chalk.bold.bgRed("Critical error occured:"));
-      this.log(chalk.bold(`- ${event.message}`));
+      console.log(chalk.bold.bgRed("Critical error occured:"));
+      console.log(chalk.bold(`- ${event.message}`));
       this._printIfNotEmpty(this.errors.getAllMessages(), chalk.red.bold("Errors found:"));
       process.exit(1);
     });
@@ -123,19 +123,19 @@ class ValidateGenerator extends Generator {
   }
 
   async shortSummary() {
-    this.log(`Validation errors count: ${this.errors.count()}`);
-    this.log(`Validation warnings count: ${this.warnings.count()}`);
-    this.log(chalk.bold("==========================================================="));
+    console.log(`Validation errors count: ${this.errors.count()}`);
+    console.log(`Validation warnings count: ${this.warnings.count()}`);
+    console.log(chalk.bold("==========================================================="));
   }
 
   async detailedSummary() {
     const allValidationMessagesCount = this.errors.count() + this.warnings.count();
 
     if (allValidationMessagesCount > 0) {
-      this.log(chalk.bold("=================== Validation summary ===================="));
+      console.log(chalk.bold("=================== Validation summary ===================="));
       this._printIfNotEmpty(this.errors.getAllMessages(), chalk.red.bold("Errors found:"));
       this._printIfNotEmpty(this.warnings.getAllMessages(), chalk.yellow("Warnings found:"));
-      this.log(chalk.bold("==========================================================="));
+      console.log(chalk.bold("==========================================================="));
     }
 
     if (this.errors.count() > 0) {
@@ -179,13 +179,13 @@ class ValidateGenerator extends Generator {
 
   _printIfNotEmpty(messages: Message[], caption: string) {
     if (messages.length > 0) {
-      this.log(caption);
+      console.log(caption);
 
       const grouped: Record<string, Message[]> = _.groupBy(messages, (msg) => msg.category);
 
       Object.keys(grouped).forEach((key) => {
-        this.log(chalk.bold(`  ${key}:`));
-        grouped[key].forEach((msg) => this.log(`   - ${msg.message}`));
+        console.log(chalk.bold(`  ${key}:`));
+        grouped[key].forEach((msg) => console.log(`   - ${msg.message}`));
       });
     }
   }
diff --git a/src/version/index.ts b/src/version/index.ts
index b3cfe779..e5b1680e 100644
--- a/src/version/index.ts
+++ b/src/version/index.ts
@@ -12,9 +12,9 @@ export default class VersionGenerator extends Generator {
 
   async printVersion(): Promise<void> {
     if (typeof this.options.verbose !== "undefined") {
-      this.log(JSON.stringify(fullInfo(), null, 2));
+      console.log(JSON.stringify(fullInfo(), null, 2));
     } else {
-      this.log(JSON.stringify(basicInfo(), null, 2));
+      console.log(JSON.stringify(basicInfo(), null, 2));
     }
   }
 }