diff --git a/package.json b/package.json
index 6ad20c5..99ef8ad 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@edx/frontend-app-gradebook",
-  "version": "1.4.37",
+  "version": "1.4.38",
   "description": "edx editable gradebook-ui to manipulate grade overrides on subsections",
   "repository": {
     "type": "git",
diff --git a/src/components/GradesTab/BulkManagementControls.jsx b/src/components/GradesTab/BulkManagementControls.jsx
index c0bf894..633ea25 100644
--- a/src/components/GradesTab/BulkManagementControls.jsx
+++ b/src/components/GradesTab/BulkManagementControls.jsx
@@ -3,59 +3,72 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 
-import { StatefulButton } from '@edx/paragon';
-import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
-import { faDownload, faSpinner } from '@fortawesome/free-solid-svg-icons';
+import { StatefulButton, Icon } from '@edx/paragon';
 
+import { StrictDict } from 'utils';
 import actions from 'data/actions';
 import selectors from 'data/selectors';
 
+export const basicButtonProps = () => ({
+  variant: 'outline-primary',
+  icons: {
+    default: <Icon className="fa fa-download mr-2" />,
+    pending: <Icon className="fa fa-spinner fa-spin mr-2" />,
+  },
+  disabledStates: ['pending'],
+  className: 'ml-2',
+});
+
+export const buttonStates = StrictDict({
+  pending: 'pending',
+  default: 'default',
+});
+
+/**
+ * <BulkManagementControls />
+ * Provides download buttons for Bulk Management and Intervention reports, only if
+ * showBulkManagement is set in redus.
+ */
 export class BulkManagementControls extends React.Component {
-  handleClickDownloadInterventions = () => {
-    this.props.downloadInterventionReport(this.props.courseId);
-    window.location = this.props.interventionExportUrl;
-  };
+  constructor(props) {
+    super(props);
+    this.buttonProps = this.buttonProps.bind(this);
+    this.handleClickDownloadInterventions = this.handleClickDownloadInterventions.bind(this);
+    this.handleClickExportGrades = this.handleClickExportGrades.bind(this);
+  }
+
+  buttonProps(label) {
+    return {
+      labels: { default: label, pending: label },
+      state: this.props.showSpinner ? 'pending' : 'default',
+      ...basicButtonProps(),
+    };
+  }
+
+  handleClickDownloadInterventions() {
+    this.props.downloadInterventionReport();
+    window.location.assign(this.props.interventionExportUrl);
+  }
 
   // At present, we don't store label and value in google analytics. By setting the label
   // property of the below events, I want to verify that we can set the label of google anlatyics
   // The following properties of a google analytics event are:
-  // category (used), name(used), lavel(not used), value(not used)
-  handleClickExportGrades = () => {
-    this.props.downloadBulkGradesReport(this.props.courseId);
-    window.location = this.props.gradeExportUrl;
-  };
+  // category (used), name(used), label(not used), value(not used)
+  handleClickExportGrades() {
+    this.props.downloadBulkGradesReport();
+    window.location.assign(this.props.gradeExportUrl);
+  }
 
   render() {
     return this.props.showBulkManagement && (
       <div>
         <StatefulButton
-          variant="outline-primary"
+          {...this.buttonProps('Bulk Management')}
           onClick={this.handleClickExportGrades}
-          state={this.props.showSpinner ? 'pending' : 'default'}
-          labels={{
-            default: 'Bulk Management',
-            pending: 'Bulk Management',
-          }}
-          icons={{
-            default: <FontAwesomeIcon className="mr-2" icon={faDownload} />,
-            pending: <FontAwesomeIcon className="fa-spin mr-2" icon={faSpinner} />,
-          }}
-          disabledStates={['pending']}
         />
         <StatefulButton
-          variant="outline-primary"
+          {...this.buttonProps('Interventions')}
           onClick={this.handleClickDownloadInterventions}
-          state={this.props.showSpinner ? 'pending' : 'default'}
-          className="ml-2"
-          labels={{
-            default: 'Interventions*',
-            pending: 'Interventions*',
-          }}
-          icons={{
-            default: <FontAwesomeIcon className="mr-2" icon={faDownload} />,
-            pending: <FontAwesomeIcon className="fa-spin mr-2" icon={faSpinner} />,
-          }}
-          disabledStates={['pending']}
         />
       </div>
     );
@@ -63,14 +76,11 @@ export class BulkManagementControls extends React.Component {
 }
 
 BulkManagementControls.defaultProps = {
-  courseId: '',
   showBulkManagement: false,
   showSpinner: false,
 };
 
 BulkManagementControls.propTypes = {
-  courseId: PropTypes.string,
-
   // redux
   downloadBulkGradesReport: PropTypes.func.isRequired,
   downloadInterventionReport: PropTypes.func.isRequired,
@@ -80,13 +90,10 @@ BulkManagementControls.propTypes = {
   showBulkManagement: PropTypes.bool,
 };
 
-export const mapStateToProps = (state, ownProps) => ({
-  gradeExportUrl: selectors.root.gradeExportUrl(state, { courseId: ownProps.courseId }),
-  interventionExportUrl: selectors.root.interventionExportUrl(
-    state,
-    { courseId: ownProps.courseId },
-  ),
-  showBulkManagement: selectors.root.showBulkManagement(state, { courseId: ownProps.courseId }),
+export const mapStateToProps = (state) => ({
+  gradeExportUrl: selectors.root.gradeExportUrl(state),
+  interventionExportUrl: selectors.root.interventionExportUrl(state),
+  showBulkManagement: selectors.root.showBulkManagement(state),
   showSpinner: selectors.root.shouldShowSpinner(state),
 });
 
diff --git a/src/components/GradesTab/BulkManagementControls.test.jsx b/src/components/GradesTab/BulkManagementControls.test.jsx
new file mode 100644
index 0000000..e48a459
--- /dev/null
+++ b/src/components/GradesTab/BulkManagementControls.test.jsx
@@ -0,0 +1,168 @@
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import actions from 'data/actions';
+import selectors from 'data/selectors';
+
+import {
+  BulkManagementControls,
+  basicButtonProps,
+  buttonStates,
+  mapStateToProps,
+  mapDispatchToProps,
+} from './BulkManagementControls';
+
+jest.mock('data/selectors', () => ({
+  __esModule: true,
+  default: {
+    root: {
+      gradeExportUrl: (state) => ({ gradeExportUrl: state }),
+      interventionExportUrl: (state) => ({ interventionExportUrl: state }),
+      showBulkManagement: (state) => ({ showBulkManagement: state }),
+      shouldShowSpinner: (state) => ({ showSpinner: state }),
+    },
+  },
+}));
+jest.mock('data/actions', () => ({
+  __esModule: true,
+  default: {
+    grades: {
+      downloadReport: {
+        bulkGrades: jest.fn(),
+        intervention: jest.fn(),
+      },
+    },
+  },
+}));
+
+describe('BulkManagementControls', () => {
+  describe('component', () => {
+    let el;
+    let props = {
+      gradeExportUrl: 'gradesGoHere',
+      interventionExportUrl: 'interventionsGoHere',
+    };
+    beforeEach(() => {
+      props = {
+        ...props,
+        downloadBulkGradesReport: jest.fn(),
+        downloadInterventionReport: jest.fn(),
+      };
+    });
+    test('snapshot - empty if showBulkManagement is not truthy', () => {
+      expect(shallow(<BulkManagementControls {...props} />)).toEqual({});
+    });
+    test('snapshot - buttonProps for each button ("Bulk Management" and "Interventions")', () => {
+      el = shallow(<BulkManagementControls {...props} showBulkManagement />);
+      jest.spyOn(el.instance(), 'buttonProps').mockImplementation(
+        value => ({ buttonProps: value }),
+      );
+      jest.spyOn(el.instance(), 'handleClickExportGrades').mockName('this.handleClickExportGrades');
+      jest.spyOn(
+        el.instance(),
+        'handleClickDownloadInterventions',
+      ).mockName('this.handleClickDownloadInterventions');
+    });
+    describe('behavior', () => {
+      const oldWindowLocation = window.location;
+
+      beforeAll(() => {
+        delete window.location;
+        window.location = Object.defineProperties(
+          {},
+          {
+            ...Object.getOwnPropertyDescriptors(oldWindowLocation),
+            assign: {
+              configurable: true,
+              value: jest.fn(),
+            },
+          },
+        );
+      });
+      beforeEach(() => {
+        window.location.assign.mockReset();
+        el = shallow(<BulkManagementControls {...props} showBulkManagement />);
+      });
+      afterAll(() => {
+        // restore `window.location` to the `jsdom` `Location` object
+        window.location = oldWindowLocation;
+      });
+
+      describe('buttonProps', () => {
+        test('loads default and pending labels based on passed string', () => {
+          const label = 'Fake Label';
+          const { labels, state, ...rest } = el.instance().buttonProps(label);
+          expect(rest).toEqual(basicButtonProps());
+          expect(labels).toEqual({ default: label, pending: label });
+        });
+        test('loads pending state if props.showSpinner', () => {
+          const label = 'Fake Label';
+          el.setProps({ showSpinner: true });
+          const { labels, state, ...rest } = el.instance().buttonProps(label);
+          expect(state).toEqual(buttonStates.pending);
+          expect(rest).toEqual(basicButtonProps());
+        });
+        test('loads default state if not props.showSpinner', () => {
+          const label = 'Fake Label';
+          const { labels, state, ...rest } = el.instance().buttonProps(label);
+          expect(state).toEqual(buttonStates.default);
+          expect(rest).toEqual(basicButtonProps());
+        });
+      });
+      describe('handleClickDownloadInterventions', () => {
+        const assertions = [
+          'calls props.downloadInterventionReport',
+          'sets location to props.interventionsExportUrl',
+        ];
+        it(assertions.join(' and '), () => {
+          el.instance().handleClickDownloadInterventions();
+          expect(props.downloadInterventionReport).toHaveBeenCalled();
+          expect(window.location.assign).toHaveBeenCalledWith(props.interventionExportUrl);
+        });
+      });
+      describe('handleClickExportGrades', () => {
+        const assertions = [
+          'calls props.downloadBulkGradesReport',
+          'sets location to props.gradeExportUrl',
+        ];
+        it(assertions.join(' and '), () => {
+          el.instance().handleClickExportGrades();
+          expect(props.downloadBulkGradesReport).toHaveBeenCalled();
+          expect(window.location.assign).toHaveBeenCalledWith(props.gradeExportUrl);
+        });
+      });
+    });
+  });
+
+  describe('mapStateToProps', () => {
+    let mapped;
+    const testState = { do: 'not', test: 'me' };
+    beforeEach(() => {
+      mapped = mapStateToProps(testState);
+    });
+    test('gradeExportUrl from root.gradeExportUrl', () => {
+      expect(mapped.gradeExportUrl).toEqual(selectors.root.gradeExportUrl(testState));
+    });
+    test('interventionExportUrl from root.interventionExportUrl', () => {
+      expect(mapped.interventionExportUrl).toEqual(selectors.root.interventionExportUrl(testState));
+    });
+    test('showBulkManagement from root.showBulkManagement', () => {
+      expect(mapped.showBulkManagement).toEqual(selectors.root.showBulkManagement(testState));
+    });
+    test('showSpinner from root.shouldShowSpinner', () => {
+      expect(mapped.showSpinner).toEqual(selectors.root.shouldShowSpinner(testState));
+    });
+  });
+  describe('mapDispatchToProps', () => {
+    test('downloadBulkGradesReport from actions.grades.downloadReport.bulkGrades', () => {
+      expect(
+        mapDispatchToProps.downloadBulkGradesReport,
+      ).toEqual(actions.grades.downloadReport.bulkGrades);
+    });
+    test('downloadInterventionReport from actions.grades.downloadReport.invervention', () => {
+      expect(
+        mapDispatchToProps.downloadInterventionReport,
+      ).toEqual(actions.grades.downloadReport.intervention);
+    });
+  });
+});
diff --git a/src/components/GradesTab/ScoreViewInput.jsx b/src/components/GradesTab/ScoreViewInput.jsx
index 7131678..e3638aa 100644
--- a/src/components/GradesTab/ScoreViewInput.jsx
+++ b/src/components/GradesTab/ScoreViewInput.jsx
@@ -2,18 +2,26 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
 
-import { InputSelect } from '@edx/paragon';
+import { FormControl, FormGroup, FormLabel } from '@edx/paragon';
 
 import actions from 'data/actions';
 
-const ScoreViewInput = ({ toggleFormat }) => (
-  <InputSelect
-    label="Score View:"
-    name="ScoreView"
-    value="percent"
-    options={[{ label: 'Percent', value: 'percent' }, { label: 'Absolute', value: 'absolute' }]}
-    onChange={toggleFormat}
-  />
+/**
+ * <ScoreViewInput />
+ * redux-connected select control for grade format (percent vs absolute)
+ */
+export const ScoreViewInput = ({ toggleFormat }) => (
+  <FormGroup controlId="ScoreView">
+    <FormLabel>Score View:</FormLabel>
+    <FormControl
+      as="select"
+      value="percent"
+      onChange={toggleFormat}
+    >
+      <option value="percent">Percent</option>
+      <option value="absolute">Absolute</option>
+    </FormControl>
+  </FormGroup>
 );
 ScoreViewInput.propTypes = {
   toggleFormat: PropTypes.func.isRequired,
diff --git a/src/components/GradesTab/ScoreViewInput.test.jsx b/src/components/GradesTab/ScoreViewInput.test.jsx
new file mode 100644
index 0000000..de22ecf
--- /dev/null
+++ b/src/components/GradesTab/ScoreViewInput.test.jsx
@@ -0,0 +1,42 @@
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import actions from 'data/actions';
+
+import { ScoreViewInput, mapDispatchToProps } from './ScoreViewInput';
+
+jest.mock('@edx/paragon', () => ({
+  FormControl: () => 'FormControl',
+  FormGroup: () => 'FormGroup',
+  FormLabel: () => 'FormLabel',
+}));
+
+jest.mock('data/actions', () => ({
+  __esModule: true,
+  default: {
+    grades: { toggleGradeFormat: jest.fn() },
+  },
+}));
+
+describe('ScoreViewInput', () => {
+  describe('component', () => {
+    let props;
+    let el;
+    beforeEach(() => {
+      props = { toggleFormat: jest.fn() };
+      el = shallow(<ScoreViewInput {...props} />);
+    });
+    const assertions = [
+      'select box with percent and absolute options',
+      'onClick from props.toggleFormat',
+    ];
+    test(`snapshot - ${assertions.join(' and ')}`, () => {
+      expect(el).toMatchSnapshot();
+    });
+  });
+  describe('mapDispatchToProps', () => {
+    test('toggleFormat from actions.grades.toggleGradeFormat', () => {
+      expect(mapDispatchToProps.toggleFormat).toEqual(actions.grades.toggleGradeFormat);
+    });
+  });
+});
diff --git a/src/components/GradesTab/SpinnerIcon.jsx b/src/components/GradesTab/SpinnerIcon.jsx
index 92e9ed3..398201c 100644
--- a/src/components/GradesTab/SpinnerIcon.jsx
+++ b/src/components/GradesTab/SpinnerIcon.jsx
@@ -7,19 +7,21 @@ import { Icon } from '@edx/paragon';
 
 import selectors from 'data/selectors';
 
-const SpinnerIcon = ({ show }) => {
-  if (!show) {
-    return null;
-  }
-  return (
-    <div className="spinner-overlay">
-      <Icon className="fa fa-spinner fa-spin fa-5x color-black" />
-    </div>
-  );
+/**
+ * <SpinnerIcon />
+ * Simmple redux-connected icon component that shows a spinner overlay only if
+ * redux state says it should.
+ */
+export const SpinnerIcon = ({ show }) => show && (
+  <div className="spinner-overlay">
+    <Icon className="fa fa-spinner fa-spin fa-5x color-black" />
+  </div>
+);
+SpinnerIcon.defaultProps = {
+  show: false,
 };
-
 SpinnerIcon.propTypes = {
-  show: PropTypes.bool.isRequired,
+  show: PropTypes.bool,
 };
 
 export const mapStateToProps = (state) => ({
diff --git a/src/components/GradesTab/SpinnerIcon.test.jsx b/src/components/GradesTab/SpinnerIcon.test.jsx
new file mode 100644
index 0000000..0ffd088
--- /dev/null
+++ b/src/components/GradesTab/SpinnerIcon.test.jsx
@@ -0,0 +1,32 @@
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import selectors from 'data/selectors';
+import { SpinnerIcon, mapStateToProps } from './SpinnerIcon';
+
+jest.mock('@edx/paragon', () => ({
+  Icon: () => 'Icon',
+}));
+jest.mock('data/selectors', () => ({
+  __esModule: true,
+  default: {
+    root: { shouldShowSpinner: state => ({ shouldShowSpinner: state }) },
+  },
+}));
+
+describe('SpinnerIcon', () => {
+  describe('component', () => {
+    it('snapshot - does not render if show: false', () => {
+      expect(shallow(<SpinnerIcon />)).toMatchSnapshot();
+    });
+    test('snapshot - displays spinner overlay with spinner icon', () => {
+      expect(shallow(<SpinnerIcon show />)).toMatchSnapshot();
+    });
+  });
+  describe('mapStateToProps', () => {
+    const testState = { a: 'nice', day: 'for', some: 'sun' };
+    test('show from root.shouldShowSpinner', () => {
+      expect(mapStateToProps(testState).show).toEqual(selectors.root.shouldShowSpinner(testState));
+    });
+  });
+});
diff --git a/src/components/GradesTab/UsersLabel.jsx b/src/components/GradesTab/UsersLabel.jsx
index c59f392..9a2999c 100644
--- a/src/components/GradesTab/UsersLabel.jsx
+++ b/src/components/GradesTab/UsersLabel.jsx
@@ -5,7 +5,11 @@ import { connect } from 'react-redux';
 
 import selectors from 'data/selectors';
 
-const UsersLabel = ({
+/**
+ * <UsersLabel />
+ * Simple label component displaying the filtered and total users shown
+ */
+export const UsersLabel = ({
   filteredUsersCount,
   totalUsersCount,
 }) => {
diff --git a/src/components/GradesTab/UsersLabel.test.jsx b/src/components/GradesTab/UsersLabel.test.jsx
new file mode 100644
index 0000000..43a4335
--- /dev/null
+++ b/src/components/GradesTab/UsersLabel.test.jsx
@@ -0,0 +1,46 @@
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import selectors from 'data/selectors';
+import { UsersLabel, mapStateToProps } from './UsersLabel';
+
+jest.mock('@edx/paragon', () => ({
+  Icon: () => 'Icon',
+}));
+jest.mock('data/selectors', () => ({
+  __esModule: true,
+  default: {
+    grades: {
+      filteredUsersCount: state => ({ filteredUsersCount: state }),
+      totalUsersCount: state => ({ totalUsersCount: state }),
+    },
+  },
+}));
+
+describe('UsersLabel', () => {
+  describe('component', () => {
+    const props = {
+      filteredUsersCount: 23,
+      totalUsersCount: 140,
+    };
+    it('does not render if totalUsersCount is falsey', () => {
+      expect(shallow(<UsersLabel {...props} totalUsersCount={0} />)).toEqual({});
+    });
+    test('snapshot - displays label with number of filtered users out of total', () => {
+      expect(shallow(<UsersLabel {...props} />)).toMatchSnapshot();
+    });
+  });
+  describe('mapStateToProps', () => {
+    const testState = { a: 'nice', day: 'for', some: 'rain' };
+    let mapped;
+    beforeEach(() => {
+      mapped = mapStateToProps(testState);
+    });
+    test('filteredUsersCount from grades.filteredUsersCount', () => {
+      expect(mapped.filteredUsersCount).toEqual(selectors.grades.filteredUsersCount(testState));
+    });
+    test('totalUsersCount from grades.totalUsersCount', () => {
+      expect(mapped.totalUsersCount).toEqual(selectors.grades.totalUsersCount(testState));
+    });
+  });
+});
diff --git a/src/components/GradesTab/__snapshots__/ScoreViewInput.test.jsx.snap b/src/components/GradesTab/__snapshots__/ScoreViewInput.test.jsx.snap
new file mode 100644
index 0000000..df8a230
--- /dev/null
+++ b/src/components/GradesTab/__snapshots__/ScoreViewInput.test.jsx.snap
@@ -0,0 +1,27 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`ScoreViewInput component snapshot - select box with percent and absolute options and onClick from props.toggleFormat 1`] = `
+<FormGroup
+  controlId="ScoreView"
+>
+  <FormLabel>
+    Score View:
+  </FormLabel>
+  <FormControl
+    as="select"
+    onChange={[MockFunction]}
+    value="percent"
+  >
+    <option
+      value="percent"
+    >
+      Percent
+    </option>
+    <option
+      value="absolute"
+    >
+      Absolute
+    </option>
+  </FormControl>
+</FormGroup>
+`;
diff --git a/src/components/GradesTab/__snapshots__/SpinnerIcon.test.jsx.snap b/src/components/GradesTab/__snapshots__/SpinnerIcon.test.jsx.snap
new file mode 100644
index 0000000..6a99def
--- /dev/null
+++ b/src/components/GradesTab/__snapshots__/SpinnerIcon.test.jsx.snap
@@ -0,0 +1,13 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`SpinnerIcon component snapshot - displays spinner overlay with spinner icon 1`] = `
+<div
+  className="spinner-overlay"
+>
+  <Icon
+    className="fa fa-spinner fa-spin fa-5x color-black"
+  />
+</div>
+`;
+
+exports[`SpinnerIcon component snapshot - does not render if show: false 1`] = `""`;
diff --git a/src/components/GradesTab/__snapshots__/UsersLabel.test.jsx.snap b/src/components/GradesTab/__snapshots__/UsersLabel.test.jsx.snap
new file mode 100644
index 0000000..b60d7fe
--- /dev/null
+++ b/src/components/GradesTab/__snapshots__/UsersLabel.test.jsx.snap
@@ -0,0 +1,19 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`UsersLabel component snapshot - displays label with number of filtered users out of total 1`] = `
+<Fragment>
+  Showing 
+  <span
+    className="font-weight-bold"
+  >
+    23
+  </span>
+   of 
+  <span
+    className="font-weight-bold"
+  >
+    140
+  </span>
+   total learners
+</Fragment>
+`;
diff --git a/src/components/Header/__snapshots__/test.jsx.snap b/src/components/Header/__snapshots__/test.jsx.snap
new file mode 100644
index 0000000..77cb97f
--- /dev/null
+++ b/src/components/Header/__snapshots__/test.jsx.snap
@@ -0,0 +1,23 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Header snapshot - has edx link with logo url 1`] = `
+<div
+  className="mb-3"
+>
+  <header
+    className="d-flex justify-content-center align-items-center p-3 border-bottom-blue"
+  >
+    <Hyperlink
+      destination="undefined/dashboard"
+    >
+      <img
+        alt="edX logo"
+        height="30"
+        src="www.ourLogo.url"
+        width="60"
+      />
+    </Hyperlink>
+    <div />
+  </header>
+</div>
+`;
diff --git a/src/components/Header/index.jsx b/src/components/Header/index.jsx
index 2eb8c91..0b669f3 100644
--- a/src/components/Header/index.jsx
+++ b/src/components/Header/index.jsx
@@ -2,23 +2,20 @@ import React from 'react';
 import { Hyperlink } from '@edx/paragon';
 import { getConfig } from '@edx/frontend-platform';
 
-export default class Header extends React.Component {
-  renderLogo() {
-    return (
-      <img src={getConfig().LOGO_URL} alt="edX logo" height="30" width="60" />
-    );
-  }
+/**
+ * <Header />
+ * Gradebook MFE app header.
+ * Displays edx logo, linked to lms dashboard
+ */
+const Header = () => (
+  <div className="mb-3">
+    <header className="d-flex justify-content-center align-items-center p-3 border-bottom-blue">
+      <Hyperlink destination={`${getConfig().LMS_BASE_URL}/dashboard`}>
+        <img src={getConfig().LOGO_URL} alt="edX logo" height="30" width="60" />
+      </Hyperlink>
+      <div />
+    </header>
+  </div>
+);
 
-  render() {
-    return (
-      <div className="mb-3">
-        <header className="d-flex justify-content-center align-items-center p-3 border-bottom-blue">
-          <Hyperlink destination={`${getConfig().LMS_BASE_URL}/dashboard`}>
-            {this.renderLogo()}
-          </Hyperlink>
-          <div />
-        </header>
-      </div>
-    );
-  }
-}
+export default Header;
diff --git a/src/components/Header/test.jsx b/src/components/Header/test.jsx
new file mode 100644
index 0000000..75ac944
--- /dev/null
+++ b/src/components/Header/test.jsx
@@ -0,0 +1,21 @@
+import React from 'react';
+import { shallow } from 'enzyme';
+
+import { getConfig } from '@edx/frontend-platform';
+
+import Header from '.';
+
+jest.mock('@edx/paragon', () => ({
+  Hyperlink: () => 'Hyperlink',
+}));
+jest.mock('@edx/frontend-platform', () => ({
+  getConfig: jest.fn(),
+}));
+
+describe('Header', () => {
+  test('snapshot - has edx link with logo url', () => {
+    const url = 'www.ourLogo.url';
+    getConfig.mockReturnValue({ LOGO_URL: url });
+    expect(shallow(<Header />)).toMatchSnapshot();
+  });
+});
diff --git a/src/containers/GradebookPage/__snapshots__/test.jsx.snap b/src/containers/GradebookPage/__snapshots__/test.jsx.snap
new file mode 100644
index 0000000..976a90b
--- /dev/null
+++ b/src/containers/GradebookPage/__snapshots__/test.jsx.snap
@@ -0,0 +1,65 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`GradebookPage component snapshot - shows BulkManagementTab if showBulkManagement 1`] = `
+<WithSidebar
+  sidebar={
+    <GradebookFilters
+      updateQueryParams={[MockFunction updateQueryParams]}
+    />
+  }
+  sidebarHeader={<GradebookFiltersHeader />}
+>
+  <div
+    className="px-3 gradebook-content"
+  >
+    <GradebookHeader />
+    <Tabs
+      defaultActiveKey="grades"
+    >
+      <Tab
+        eventKey="grades"
+        title="Grades"
+      >
+        <GradesTab
+          updateQueryParams={[MockFunction updateQueryParams]}
+        />
+      </Tab>
+      <Tab
+        eventKey="bulk_management"
+        title="Bulk Management"
+      >
+        <BulkManagementTab />
+      </Tab>
+    </Tabs>
+  </div>
+</WithSidebar>
+`;
+
+exports[`GradebookPage component snapshot - shows only GradesTab if showBulkManagement=false 1`] = `
+<WithSidebar
+  sidebar={
+    <GradebookFilters
+      updateQueryParams={[MockFunction updateQueryParams]}
+    />
+  }
+  sidebarHeader={<GradebookFiltersHeader />}
+>
+  <div
+    className="px-3 gradebook-content"
+  >
+    <GradebookHeader />
+    <Tabs
+      defaultActiveKey="grades"
+    >
+      <Tab
+        eventKey="grades"
+        title="Grades"
+      >
+        <GradesTab
+          updateQueryParams={[MockFunction updateQueryParams]}
+        />
+      </Tab>
+    </Tabs>
+  </div>
+</WithSidebar>
+`;
diff --git a/src/containers/GradebookPage/index.jsx b/src/containers/GradebookPage/index.jsx
index f2e8670..79eceaf 100644
--- a/src/containers/GradebookPage/index.jsx
+++ b/src/containers/GradebookPage/index.jsx
@@ -16,6 +16,12 @@ import GradebookFilters from 'components/GradebookFilters';
 import GradebookFiltersHeader from 'components/GradebookFiltersHeader';
 import BulkManagementTab from 'components/BulkManagementTab';
 
+/**
+ * <GradebookPage />
+ * Top-level view for the Gradebook MFE.
+ * Organizes a header and a pair of tabs (Grades and BulkManagement) with a toggle-able
+ * filter sidebar.
+ */
 export class GradebookPage extends React.Component {
   constructor(props) {
     super(props);
@@ -24,7 +30,7 @@ export class GradebookPage extends React.Component {
 
   componentDidMount() {
     const urlQuery = queryString.parse(this.props.location.search);
-    this.props.initializeApp(this.props.courseId, urlQuery);
+    this.props.initializeApp(this.props.match.params.courseId, urlQuery);
   }
 
   updateQueryParams(queryParams) {
@@ -63,21 +69,24 @@ export class GradebookPage extends React.Component {
   }
 }
 GradebookPage.defaultProps = {
-  location: { search: '' },
   showBulkManagement: false,
+  location: { search: '' },
 };
 GradebookPage.propTypes = {
   history: PropTypes.shape({
     push: PropTypes.func,
   }).isRequired,
   location: PropTypes.shape({ search: PropTypes.string }),
-  courseId: PropTypes.string.isRequired,
   initializeApp: PropTypes.func.isRequired,
   showBulkManagement: PropTypes.bool,
+  match: PropTypes.shape({
+    params: PropTypes.shape({
+      courseId: PropTypes.string,
+    }),
+  }).isRequired,
 };
 
-export const mapStateToProps = (state, ownProps) => ({
-  courseId: ownProps.match.params.courseId,
+export const mapStateToProps = (state) => ({
   showBulkManagement: selectors.root.showBulkManagement(state),
 });
 
diff --git a/src/containers/GradebookPage/test.jsx b/src/containers/GradebookPage/test.jsx
new file mode 100644
index 0000000..f4b2ce2
--- /dev/null
+++ b/src/containers/GradebookPage/test.jsx
@@ -0,0 +1,181 @@
+/* eslint-disable import/no-named-as-default */
+import React from 'react';
+import { shallow } from 'enzyme';
+import queryString from 'query-string';
+
+import selectors from 'data/selectors';
+import thunkActions from 'data/thunkActions';
+
+import { Tab, Tabs } from '@edx/paragon';
+
+import GradebookFilters from 'components/GradebookFilters';
+import GradebookFiltersHeader from 'components/GradebookFiltersHeader';
+import GradebookHeader from 'components/GradebookHeader';
+import GradesTab from 'components/GradesTab';
+import BulkManagementTab from 'components/BulkManagementTab';
+
+import { GradebookPage, mapStateToProps, mapDispatchToProps } from '.';
+
+jest.mock('query-string', () => ({
+  parse: jest.fn(val => ({ parsed: val })),
+  stringify: (val) => `stringify: ${JSON.stringify(val, Object.keys(val).sort())}`,
+}));
+
+jest.mock('@edx/paragon', () => ({
+  Tab: () => 'Tab',
+  Tabs: () => 'Tabs',
+}));
+jest.mock('data/selectors', () => ({
+  __esModule: true,
+  default: {
+    root: {
+      showBulkManagement: (state) => ({ showBulkManagement: state }),
+    },
+  },
+}));
+jest.mock('data/thunkActions', () => ({
+  __esModule: true,
+  default: {
+    app: { initialize: jest.fn() },
+  },
+}));
+
+jest.mock('components/WithSidebar', () => 'WithSidebar');
+jest.mock('components/GradebookHeader', () => 'GradebookHeader');
+jest.mock('components/GradesTab', () => 'GradesTab');
+jest.mock('components/GradebookFilters', () => 'GradebookFilters');
+jest.mock('components/GradebookFiltersHeader', () => 'GradebookFiltersHeader');
+jest.mock('components/BulkManagementTab', () => 'BulkManagementTab');
+
+describe('GradebookPage', () => {
+  describe('component', () => {
+    const courseId = 'a course';
+    let el;
+    const props = {
+      location: {
+        search: 'searchString',
+      },
+      match: { params: { courseId } },
+    };
+    beforeEach(() => {
+      props.initializeApp = jest.fn();
+      props.history = { push: jest.fn() };
+    });
+    test('snapshot - shows BulkManagementTab if showBulkManagement', () => {
+      el = shallow(<GradebookPage {...props} showBulkManagement />);
+      el.instance().updateQueryParams = jest.fn().mockName('updateQueryParams');
+      expect(el.instance().render()).toMatchSnapshot();
+    });
+    test('snapshot - shows only GradesTab if showBulkManagement=false', () => {
+      el = shallow(<GradebookPage {...props} />);
+      el.instance().updateQueryParams = jest.fn().mockName('updateQueryParams');
+      expect(el.instance().render()).toMatchSnapshot();
+    });
+    describe('render', () => {
+      beforeEach(() => {
+        el = shallow(<GradebookPage {...props} />);
+      });
+      describe('top-level WithSidebar', () => {
+        test('sidebar from GradebookFilters, with updateQueryParams', () => {
+          const { sidebar } = el.props();
+          expect(sidebar).toEqual(
+            <GradebookFilters updateQueryParams={el.instance().updateQueryParams} />,
+          );
+        });
+        test('sidebarHeader from GradebookFiltersHeader', () => {
+          const { sidebarHeader } = el.props();
+          expect(sidebarHeader).toEqual(<GradebookFiltersHeader />);
+        });
+      });
+      describe('gradebook-content', () => {
+        let content;
+        let children;
+        beforeEach(() => {
+          content = el.props().children;
+          children = content.props.children;
+        });
+        it('is wrapped in a div w/ px-3 gradebook-content classNames', () => {
+          expect(content.type).toEqual('div');
+          expect(content.props.className).toEqual('px-3 gradebook-content');
+        });
+        it('displays Gradebook header and then tabs', () => {
+          expect(children[0]).toEqual(<GradebookHeader />);
+        });
+        it('displays tabs with only GradesTab if not showBulkManagement', () => {
+          expect(shallow(children[1])).toEqual(shallow(
+            <Tabs defaultActiveKey="grades">
+              <Tab eventKey="grades" title="Grades">
+                <GradesTab updateQueryParams={el.instance().updateQueryParams} />
+              </Tab>
+            </Tabs>,
+          ));
+        });
+        it('displays tabs with grades and BulkManagement if showBulkManagement', () => {
+          el = shallow(<GradebookPage {...props} showBulkManagement />);
+          const tabs = el.props().children.props.children[1];
+          expect(tabs).toEqual(
+            <Tabs defaultActiveKey="grades">
+              <Tab eventKey="grades" title="Grades">
+                <GradesTab updateQueryParams={el.instance().updateQueryParams} />
+              </Tab>
+              <Tab eventKey="bulk_management" title="Bulk Management">
+                <BulkManagementTab />
+              </Tab>
+            </Tabs>,
+          );
+        });
+      });
+    });
+    describe('behavior', () => {
+      beforeEach(() => {
+        el = shallow(<GradebookPage {...props} />, { disableLifecucleMethods: true });
+      });
+      describe('componentDidMount', () => {
+        test('initializes app with courseId and urlQuery', () => {
+          el.instance().componentDidMount();
+          expect(props.initializeApp).toHaveBeenCalledWith(
+            courseId,
+            queryString.parse(props.location.search),
+          );
+        });
+      });
+      describe('updateQueryParams', () => {
+        it('replaces values for truthy values', () => {
+          queryString.parse.mockImplementation(key => ({ [key]: key }));
+          const newKey = 'testKey';
+          const val1 = 'VALUE';
+          const val2 = 'VALTWO!!';
+          const args = { [newKey]: val1, [props.location.search]: val2 };
+          el.instance().updateQueryParams(args);
+          expect(props.history.push).toHaveBeenCalledWith(`?${queryString.stringify(args)}`);
+        });
+        it('clears values for non-truthy values', () => {
+          queryString.parse.mockImplementation(key => ({ [key]: key }));
+          const newKey = 'testKey';
+          const val1 = 'VALUE';
+          const val2 = false;
+          const args = { [newKey]: val1, [props.location.search]: val2 };
+          el.instance().updateQueryParams(args);
+          expect(props.history.push).toHaveBeenCalledWith(
+            `?${queryString.stringify({ [newKey]: val1 })}`,
+          );
+        });
+      });
+    });
+  });
+  describe('mapStateToProps', () => {
+    let mapped;
+    const testState = { trash: 'in', the: 'wind' };
+    beforeEach(() => {
+      mapped = mapStateToProps(testState);
+    });
+    test('showBulkManagement from root.showBulkManagement', () => {
+      expect(mapped.showBulkManagement).toEqual(selectors.root.showBulkManagement(testState));
+    });
+  });
+  describe('mapDispatchToProps', () => {
+    test('initializeApp from thunkActions.app.initialize', () => {
+      expect(mapDispatchToProps.initializeApp).toEqual(thunkActions.app.initialize);
+    });
+  });
+});