diff --git a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-04-Test-Selection.md b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-04-Test-Selection.md
index 61140df..d853581 100644
--- a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-04-Test-Selection.md	
+++ b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-04-Test-Selection.md	
@@ -36,7 +36,7 @@ This phase implements the test selection panel and analysis configuration contro
 - [x] Search/filter narrows visible tests by name
 - [x] DNS resolution toggle defaults to off
 - [x] Decode-all toggle is functional
-- [ ] All controls are keyboard accessible (Tab, Enter, Space)
+- [x] All controls are keyboard accessible (Tab, Enter, Space)
 - [ ] Linting passes (`ruff check backend/`, `npx eslint src/`)
 - [ ] Run `/speckit.analyze` to verify consistency
 
diff --git a/frontend/src/__tests__/AnalysisControls.test.tsx b/frontend/src/__tests__/AnalysisControls.test.tsx
index df75117..a62cbd7 100644
--- a/frontend/src/__tests__/AnalysisControls.test.tsx
+++ b/frontend/src/__tests__/AnalysisControls.test.tsx
@@ -178,4 +178,42 @@ describe("AnalysisControls", () => {
       expect.objectContaining({ resolve: true, decodeAll: true }),
     );
   });
+
+  it("updates toggles on Space key presses", async () => {
+    setupFetchMock(sampleTests);
+    const handleChange = vi.fn();
+
+    const AnalysisControlsHarness = () => {
+      const [config, setConfig] = useState<AnalysisConfig>({
+        testIds: [],
+        resolve: false,
+        decodeAll: false,
+      });
+
+      const updateConfig = (next: AnalysisConfig) => {
+        setConfig(next);
+        handleChange(next);
+      };
+
+      return <AnalysisControls config={config} onChange={updateConfig} />;
+    };
+
+    const { container } = render(<AnalysisControlsHarness />);
+
+    await act(async () => {
+      await flushPromises();
+    });
+
+    const resolveToggle = getToggle(container, "toggle-resolve");
+    act(() => {
+      resolveToggle.dispatchEvent(
+        new KeyboardEvent("keydown", { key: " ", bubbles: true }),
+      );
+    });
+
+    expect(resolveToggle.getAttribute("aria-checked")).toBe("true");
+    expect(handleChange).toHaveBeenLastCalledWith(
+      expect.objectContaining({ resolve: true }),
+    );
+  });
 });
diff --git a/frontend/src/__tests__/TestSelector.test.tsx b/frontend/src/__tests__/TestSelector.test.tsx
index 2c9785e..aa48709 100644
--- a/frontend/src/__tests__/TestSelector.test.tsx
+++ b/frontend/src/__tests__/TestSelector.test.tsx
@@ -164,6 +164,43 @@ describe("TestSelector", () => {
     });
   });
 
+  it("supports keyboard activation for select and deselect", async () => {
+    setupFetchMock(sampleTests);
+
+    const TestSelectorHarness = () => {
+      const [selected, setSelected] = useState<number[]>([]);
+      return <TestSelector selectedTestIds={selected} onSelectionChange={setSelected} />;
+    };
+
+    const { container } = render(<TestSelectorHarness />);
+
+    await act(async () => {
+      await flushPromises();
+    });
+
+    const selectAllButton = getSelectAllButton(container);
+    act(() => {
+      selectAllButton.dispatchEvent(
+        new KeyboardEvent("keydown", { key: "Enter", bubbles: true }),
+      );
+    });
+
+    sampleTests.forEach((test) => {
+      expect(getCheckbox(container, test.id).checked).toBe(true);
+    });
+
+    const deselectAllButton = getDeselectAllButton(container);
+    act(() => {
+      deselectAllButton.dispatchEvent(
+        new KeyboardEvent("keydown", { key: " ", bubbles: true }),
+      );
+    });
+
+    sampleTests.forEach((test) => {
+      expect(getCheckbox(container, test.id).checked).toBe(false);
+    });
+  });
+
   it("filters tests by search text", async () => {
     setupFetchMock(sampleTests);
 
diff --git a/frontend/src/components/TestSelector.tsx b/frontend/src/components/TestSelector.tsx
index b411a4c..73d3e7a 100644
--- a/frontend/src/components/TestSelector.tsx
+++ b/frontend/src/components/TestSelector.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useEffect, useMemo, useState } from "react";
+import { useEffect, useMemo, useState, type KeyboardEvent } from "react";
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
 import {
   faCheck,
@@ -46,6 +46,16 @@ const buildGroups = (tests: TestInfo[]): TestGroup[] => {
   }));
 };
 
+const handleActionKeyDown = (
+  event: KeyboardEvent<HTMLButtonElement>,
+  onAction: () => void,
+): void => {
+  if (event.key === "Enter" || event.key === " " || event.key === "Spacebar") {
+    event.preventDefault();
+    onAction();
+  }
+};
+
 export default function TestSelector({ selectedTestIds, onSelectionChange }: TestSelectorProps) {
   const [tests, setTests] = useState<TestInfo[]>([]);
   const [searchText, setSearchText] = useState("");
@@ -152,6 +162,7 @@ export default function TestSelector({ selectedTestIds, onSelectionChange }: Tes
               type="button"
               className="inline-flex items-center gap-2 rounded-full border border-info/20 bg-background/40 px-4 py-2 text-xs font-semibold uppercase tracking-[0.2em] text-text/70 transition hover:border-info/40 hover:text-text focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-info"
               onClick={handleSelectAll}
+              onKeyDown={(event) => handleActionKeyDown(event, handleSelectAll)}
               data-testid="select-all-tests"
             >
               <FontAwesomeIcon icon={faCheck} className="text-xs" />
@@ -161,6 +172,7 @@ export default function TestSelector({ selectedTestIds, onSelectionChange }: Tes
               type="button"
               className="inline-flex items-center gap-2 rounded-full border border-info/20 bg-background/40 px-4 py-2 text-xs font-semibold uppercase tracking-[0.2em] text-text/70 transition hover:border-info/40 hover:text-text focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-info"
               onClick={handleDeselectAll}
+              onKeyDown={(event) => handleActionKeyDown(event, handleDeselectAll)}
               data-testid="deselect-all-tests"
             >
               <FontAwesomeIcon icon={faXmark} className="text-xs" />