diff --git a/client/cypress/fixtures/me.join-class.json b/client/cypress/fixtures/me.join-class.json
new file mode 100644
index 00000000..0ab8c2b0
--- /dev/null
+++ b/client/cypress/fixtures/me.join-class.json
@@ -0,0 +1,35 @@
+{
+  "me": {
+    "id": "VXNlck5vZGU6NQ==",
+    "pk": 5,
+    "username": "rahel.cueni",
+    "email": "rahel.cueni@skillbox.example",
+    "firstName": "Rahel",
+    "lastName": "Cueni",
+    "avatarUrl": "",
+    "lastModule": {
+      "id": "TW9kdWxlTm9kZToxNw==",
+      "slug": "lohn-und-budget",
+      "__typename": "ModuleNode"
+    },
+    "selectedClass": {
+      "id": "U2Nob29sQ2xhc3NOb2RlOjI=",
+      "__typename": "SchoolClassNode"
+    },
+    "schoolClasses": {
+      "edges": [
+        {
+          "node": {
+            "id": "U2Nob29sQ2xhc3NOb2RlOjE=",
+            "name": "FLID2018a",
+            "__typename": "SchoolClassNode"
+          },
+          "__typename": "SchoolClassNodeEdge"
+        }
+      ],
+      "__typename": "SchoolClassNodeConnection"
+    },
+    "__typename": "UserNode",
+    "permissions": []
+  }
+}
diff --git a/client/cypress/fixtures/schema.json b/client/cypress/fixtures/schema.json
index 2b4f9f45..afadd26d 100644
--- a/client/cypress/fixtures/schema.json
+++ b/client/cypress/fixtures/schema.json
@@ -1500,6 +1500,79 @@
             "isDeprecated": false,
             "deprecationReason": null
           },
+          {
+            "name": "myInstrumentActivity",
+            "description": null,
+            "args": [
+              {
+                "name": "before",
+                "description": null,
+                "type": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                },
+                "defaultValue": null
+              },
+              {
+                "name": "after",
+                "description": null,
+                "type": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                },
+                "defaultValue": null
+              },
+              {
+                "name": "first",
+                "description": null,
+                "type": {
+                  "kind": "SCALAR",
+                  "name": "Int",
+                  "ofType": null
+                },
+                "defaultValue": null
+              },
+              {
+                "name": "last",
+                "description": null,
+                "type": {
+                  "kind": "SCALAR",
+                  "name": "Int",
+                  "ofType": null
+                },
+                "defaultValue": null
+              },
+              {
+                "name": "slug",
+                "description": null,
+                "type": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                },
+                "defaultValue": null
+              },
+              {
+                "name": "type",
+                "description": null,
+                "type": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                },
+                "defaultValue": null
+              }
+            ],
+            "type": {
+              "kind": "OBJECT",
+              "name": "InstrumentNodeConnection",
+              "ofType": null
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          },
           {
             "name": "node",
             "description": "The ID of the object",
@@ -3277,6 +3350,18 @@
             "isDeprecated": false,
             "deprecationReason": null
           },
+          {
+            "name": "code",
+            "description": "",
+            "args": [],
+            "type": {
+              "kind": "SCALAR",
+              "name": "String",
+              "ofType": null
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          },
           {
             "name": "hiddenContentBlocks",
             "description": null,
@@ -9285,6 +9370,33 @@
             "isDeprecated": false,
             "deprecationReason": null
           },
+          {
+            "name": "joinClass",
+            "description": null,
+            "args": [
+              {
+                "name": "input",
+                "description": null,
+                "type": {
+                  "kind": "NON_NULL",
+                  "name": null,
+                  "ofType": {
+                    "kind": "INPUT_OBJECT",
+                    "name": "JoinClassInput",
+                    "ofType": null
+                  }
+                },
+                "defaultValue": null
+              }
+            ],
+            "type": {
+              "kind": "OBJECT",
+              "name": "JoinClassPayload",
+              "ofType": null
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          },
           {
             "name": "addProject",
             "description": null,
@@ -11434,6 +11546,88 @@
         "enumValues": null,
         "possibleTypes": null
       },
+      {
+        "kind": "OBJECT",
+        "name": "JoinClassPayload",
+        "description": null,
+        "fields": [
+          {
+            "name": "success",
+            "description": null,
+            "args": [],
+            "type": {
+              "kind": "SCALAR",
+              "name": "Boolean",
+              "ofType": null
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          },
+          {
+            "name": "schoolClass",
+            "description": null,
+            "args": [],
+            "type": {
+              "kind": "OBJECT",
+              "name": "SchoolClassNode",
+              "ofType": null
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          },
+          {
+            "name": "clientMutationId",
+            "description": null,
+            "args": [],
+            "type": {
+              "kind": "SCALAR",
+              "name": "String",
+              "ofType": null
+            },
+            "isDeprecated": false,
+            "deprecationReason": null
+          }
+        ],
+        "inputFields": null,
+        "interfaces": [],
+        "enumValues": null,
+        "possibleTypes": null
+      },
+      {
+        "kind": "INPUT_OBJECT",
+        "name": "JoinClassInput",
+        "description": null,
+        "fields": null,
+        "inputFields": [
+          {
+            "name": "code",
+            "description": null,
+            "type": {
+              "kind": "NON_NULL",
+              "name": null,
+              "ofType": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              }
+            },
+            "defaultValue": null
+          },
+          {
+            "name": "clientMutationId",
+            "description": null,
+            "type": {
+              "kind": "SCALAR",
+              "name": "String",
+              "ofType": null
+            },
+            "defaultValue": null
+          }
+        ],
+        "interfaces": null,
+        "enumValues": null,
+        "possibleTypes": null
+      },
       {
         "kind": "OBJECT",
         "name": "AddProjectPayload",
diff --git a/client/cypress/integration/join-class.spec.js b/client/cypress/integration/join-class.spec.js
index 7472fb58..de46fef2 100644
--- a/client/cypress/integration/join-class.spec.js
+++ b/client/cypress/integration/join-class.spec.js
@@ -1,13 +1,37 @@
-describe('Survey', () => {
+const schema = require('../fixtures/schema.json');
+const me = require('../fixtures/me.join-class.json');
+
+describe('Join Class', () => {
   beforeEach(() => {
-    // todo: mock all the graphql queries and mutations
-    // cy.exec("python ../server/manage.py prepare_bookmarks_for_cypress");
+    cy.server();
+
+    cy.mockGraphql({
+      schema: schema,
+    });
 
     cy.viewport('macbook-15');
     cy.apolloLogin('rahel.cueni', 'test');
+
   });
 
   it('should join class', () => {
+    cy.mockGraphqlOps({
+      operations: {
+        MeQuery: me,
+        JoinClass: {
+          joinClass: {
+            success: true,
+            schoolClass: {
+              id: "U2Nob29sQ2xhc3NOb2RlOjI=",
+              name: "KF1A",
+              __typename: "SchoolClassNode"
+            }
+          }
+        }
+      }
+    });
+
+
     cy.visit('/me/profile');
 
     cy.get('[data-cy=class-selection]').click();
diff --git a/client/cypress/integration/survey.spec.js b/client/cypress/integration/survey.spec.js
index 97943eac..5c486fac 100644
--- a/client/cypress/integration/survey.spec.js
+++ b/client/cypress/integration/survey.spec.js
@@ -10,7 +10,6 @@ describe('Survey', () => {
     });
 
     cy.viewport('macbook-15');
-
     cy.apolloLogin('rahel.cueni', 'test');
   });