diff --git a/docs/source/release/v3.12.0/diffraction.rst b/docs/source/release/v3.12.0/diffraction.rst
index 79174ecb3939e6ada94c7ff15821a054b6fecc3b..967c8a6e5b59a730b92dd8230123218c22cd310a 100644
--- a/docs/source/release/v3.12.0/diffraction.rst
+++ b/docs/source/release/v3.12.0/diffraction.rst
@@ -37,4 +37,10 @@ Single Crystal Diffraction
Imaging
-------
+Features Removed
+----------------
+
+* The "Test the Curve Fit widget" graphical interface has been removed, it was a test harness for developers and was not intended to be exposed during earlier releases.
+
+
:ref:`Release 3.12.0 <v3.12.0>`
diff --git a/qt/scientific_interfaces/DynamicPDF/CMakeLists.txt b/qt/scientific_interfaces/DynamicPDF/CMakeLists.txt
index 69868204e1b1d9d3cf017b0baaa9791b2024dc3e..44b0c90ddc870dbf622dedd3d738145d57a67375 100644
--- a/qt/scientific_interfaces/DynamicPDF/CMakeLists.txt
+++ b/qt/scientific_interfaces/DynamicPDF/CMakeLists.txt
@@ -5,7 +5,6 @@ set ( SRC_FILES
DPDFFitOptionsBrowser.cpp
DPDFFourierTransform.cpp
DPDFInputDataControl.cpp
- DisplayCurveFitTest.cpp
SliceSelector.cpp
)
@@ -19,12 +18,10 @@ set ( INC_FILES
DPDFFitOptionsBrowser.h
DPDFFourierTransform.h
DPDFInputDataControl.h
- DisplayCurveFitTest.h
SliceSelector.h
)
-set ( MOC_FILES
- DisplayCurveFitTest.h
+set ( MOC_FILES
DPDFBackgroundRemover.h
DPDFDisplayControl.h
DPDFFitControl.h
@@ -34,8 +31,8 @@ set ( MOC_FILES
SliceSelector.h
)
-set ( UI_FILES
- DisplayCurveFitTest.ui
+
+set ( UI_FILES
DPDFBackgroundRemover.ui
DPDFFitControl.ui
DPDFFourierTransform.ui
diff --git a/qt/scientific_interfaces/DynamicPDF/DisplayCurveFitTest.cpp b/qt/scientific_interfaces/DynamicPDF/DisplayCurveFitTest.cpp
deleted file mode 100644
index 542dab3e167a3f8fab629c0850e4be8ed9d8709e..0000000000000000000000000000000000000000
--- a/qt/scientific_interfaces/DynamicPDF/DisplayCurveFitTest.cpp
+++ /dev/null
@@ -1,106 +0,0 @@
-#include "DisplayCurveFitTest.h"
-// includes for workspace handling
-#include "MantidAPI/AnalysisDataService.h"
-#include "MantidAPI/MatrixWorkspace.h"
-// includes for interface functionality
-#include "MantidQtWidgets/LegacyQwt/DisplayCurveFit.h"
-#include "MantidQtWidgets/LegacyQwt/RangeSelector.h"
-
-namespace {
-Mantid::Kernel::Logger g_log("DynamicPDF");
-}
-
-namespace MantidQt {
-namespace CustomInterfaces {
-namespace DynamicPDF {
-
-// Add this class to the list of specialised dialogs in this namespace only if
-// compiling in Debug mode
-//#ifndef NDEBUG
-DECLARE_SUBWINDOW(DisplayCurveFitTest)
-//#endif
-
-using curveType = MantidQt::MantidWidgets::DisplayCurveFit::curveType;
-using dcRange = MantidQt::MantidWidgets::DisplayCurveFit::dcRange;
-
-// ++++++++++++++++++++++++++++
-// +++++ Public Members +++++
-// ++++++++++++++++++++++++++++
-
-/// Constructor
-DisplayCurveFitTest::DisplayCurveFitTest(QWidget *parent)
- : UserSubWindow{parent} {}
-
-DisplayCurveFitTest::~DisplayCurveFitTest() {}
-
-/**
- * @brief Initialize the widgets defined within the form generated in
- * Qt-Designer. Also, defined the SIGNALS to SLOTS connections.
- */
-void DisplayCurveFitTest::initLayout() {
- m_uiForm.setupUi(this);
- connect(m_uiForm.dataSelector, SIGNAL(dataReady(const QString &)), this,
- SLOT(loadSpectra(const QString &)));
-}
-
-// +++++++++++++++++++++++++++
-// +++++ Private Slots +++++
-// +++++++++++++++++++++++++++
-
-/**
- * @brief The test proper that loads the fit curves to be
- * displayed and the two ranges.
- * @param workspaceName the name of the workspace containing
- * the data of the curves to be displayed.
- */
-void DisplayCurveFitTest::loadSpectra(const QString &workspaceName) {
- auto workspace = Mantid::API::AnalysisDataService::Instance()
- .retrieveWS<Mantid::API::MatrixWorkspace>(
- workspaceName.toStdString());
- if (!workspace) {
- auto title = QString::fromStdString(this->name());
- auto error =
- QString::fromStdString("Workspace must be of type MatrixWorkspace");
- QMessageBox::warning(this, title, error);
- return;
- }
- if (workspace->getNumberHistograms() < 4) {
- auto title = QString::fromStdString(this->name());
- auto error = QString("Not enough number of histograms in the workspace");
- QMessageBox::warning(this, title, error);
- return;
- }
- m_uiForm.displayFit->addSpectrum(curveType::data, workspace, 0);
- auto curveRange = m_uiForm.displayFit->getCurveRange(curveType::data);
- static bool firstPass{TRUE};
-
- // Set up the range selector for the fit
- m_uiForm.displayFit->addRangeSelector(dcRange::fit);
- auto rangeSelectorFit = m_uiForm.displayFit->m_rangeSelector.at(dcRange::fit);
- if (firstPass || m_uiForm.updateRangeSelectors->isChecked()) {
- rangeSelectorFit->setRange(curveRange.first, curveRange.second);
- rangeSelectorFit->setMinimum(1.05 * curveRange.first);
- rangeSelectorFit->setMaximum(0.95 * curveRange.second);
- }
-
- // Set up the range evaluate range selector
- m_uiForm.displayFit->addRangeSelector(dcRange::evaluate);
- auto rangeSelectorEvaluate =
- m_uiForm.displayFit->m_rangeSelector.at(dcRange::evaluate);
- if (firstPass || m_uiForm.updateRangeSelectors->isChecked()) {
- rangeSelectorEvaluate->setRange(curveRange.first, curveRange.second);
- rangeSelectorEvaluate->setMinimum(curveRange.first);
- rangeSelectorEvaluate->setMaximum(curveRange.second);
- }
-
- m_uiForm.displayFit->addSpectrum(curveType::fit, workspace, 1);
- m_uiForm.displayFit->addSpectrum(curveType::residuals, workspace, 2);
- m_uiForm.displayFit->addSpectrum(curveType::guess, workspace, 3);
-
- m_uiForm.displayFit->addResidualsZeroline();
- firstPass = FALSE;
-}
-
-} // namespace MantidQt
-} // namespace CustomInterfaces
-} // namespace DynamicPDF
diff --git a/qt/scientific_interfaces/DynamicPDF/DisplayCurveFitTest.h b/qt/scientific_interfaces/DynamicPDF/DisplayCurveFitTest.h
deleted file mode 100644
index 86e5d8ed7c48fb3f29481bbdcbbe9d4a7140b424..0000000000000000000000000000000000000000
--- a/qt/scientific_interfaces/DynamicPDF/DisplayCurveFitTest.h
+++ /dev/null
@@ -1,65 +0,0 @@
-#ifndef MANTIDQTCUSTOMINTERFACES_DYNAMICPDF_DISPLAYCURVEFITTEST_H_
-#define MANTIDQTCUSTOMINTERFACES_DYNAMICPDF_DISPLAYCURVEFITTEST_H_
-
-// includes for interace functionailty
-#include "DllConfig.h"
-#include "MantidQtWidgets/Common/UserSubWindow.h"
-#include "ui_DisplayCurveFitTest.h"
-
-namespace MantidQt {
-namespace CustomInterfaces {
-namespace DynamicPDF {
-
-/** An interface whose only purpose is to test widget DisplayCurveFit
- The interface is visible in MantidPlot only when compiled in Debug mode.
-
- @date 2016-02-22
-
- Copyright © 2012 ISIS Rutherford Appleton Laboratory, NScD Oak Ridge
- National Laboratory & European Spallation Source
-
- This file is part of Mantid.
-
- Mantid is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- Mantid is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-
- File change history is stored at: <https://github.com/mantidproject/mantid>
- Code Documentation is available at: <http://doxygen.mantidproject.org>
-*/
-class MANTIDQT_DYNAMICPDF_DLL DisplayCurveFitTest
- : public MantidQt::API::UserSubWindow {
- Q_OBJECT
-
-public:
- /// The name of the interface as registered into the factory
- static std::string name() { return "Test the DisplayCurveFit widget"; }
- // This interface's categories.
- static QString categoryInfo() { return "DynamicPDF"; }
-
- DisplayCurveFitTest(QWidget *parent = nullptr);
- ~DisplayCurveFitTest() override;
-
-private slots:
- void loadSpectra(const QString &workspaceName);
-
-private:
- void initLayout() override;
- /// The object containing the widgets defined in the form created in Qt
- /// Designer
- Ui::DisplayCurveFitTest m_uiForm;
-
-}; // class DisplayCurveFitTest
-} // namespace CustomInterfaces
-} // namespace DynamicPDF
-} // namespace MantidQt
-#endif // MANTIDQTCUSTOMINTERFACES_DYNAMICPDF_DISPLAYCURVEFITTEST_H_
diff --git a/qt/scientific_interfaces/DynamicPDF/DisplayCurveFitTest.ui b/qt/scientific_interfaces/DynamicPDF/DisplayCurveFitTest.ui
deleted file mode 100644
index b88a6e54bc845f60c557fbf95deee141757016c2..0000000000000000000000000000000000000000
--- a/qt/scientific_interfaces/DynamicPDF/DisplayCurveFitTest.ui
+++ /dev/null
@@ -1,79 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<ui version="4.0">
- <class>DisplayCurveFitTest</class>
- <widget class="QMainWindow" name="DisplayCurveFitTest">
- <property name="geometry">
- <rect>
- <x>0</x>
- <y>0</y>
- <width>613</width>
- <height>740</height>
- </rect>
- </property>
- <property name="sizePolicy">
- <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
- <horstretch>0</horstretch>
- <verstretch>0</verstretch>
- </sizepolicy>
- </property>
- <property name="windowTitle">
- <string>Dynamic PDF - Test DisplayCurveFit</string>
- </property>
- <widget class="QWidget" name="centralwidget">
- <property name="sizePolicy">
- <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
- <horstretch>0</horstretch>
- <verstretch>0</verstretch>
- </sizepolicy>
- </property>
- <layout class="QVBoxLayout" name="verticalLayout">
- <item>
- <widget class="MantidQt::MantidWidgets::DataSelector" name="dataSelector">
- <property name="sizePolicy">
- <sizepolicy hsizetype="Preferred" vsizetype="Minimum">
- <horstretch>0</horstretch>
- <verstretch>0</verstretch>
- </sizepolicy>
- </property>
- </widget>
- </item>
- <item>
- <widget class="MantidQt::MantidWidgets::DisplayCurveFit" name="displayFit">
- <property name="sizePolicy">
- <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
- <horstretch>0</horstretch>
- <verstretch>1</verstretch>
- </sizepolicy>
- </property>
- </widget>
- </item>
- <item>
- <layout class="QHBoxLayout" name="horizontalLayout">
- <item>
- <widget class="QCheckBox" name="updateRangeSelectors">
- <property name="text">
- <string>Update range selectors?</string>
- </property>
- </widget>
- </item>
- </layout>
- </item>
- </layout>
- </widget>
- </widget>
- <customwidgets>
- <customwidget>
- <class>MantidQt::MantidWidgets::DataSelector</class>
- <extends>QWidget</extends>
- <header>MantidQtWidgets/Common/DataSelector.h</header>
- </customwidget>
- <customwidget>
- <class>MantidQt::MantidWidgets::DisplayCurveFit</class>
- <extends>QWidget</extends>
- <header>MantidQtWidgets/LegacyQwt/DisplayCurveFit.h</header>
- <container>1</container>
- </customwidget>
- </customwidgets>
- <resources/>
- <connections/>
-</ui>